spi: Remove unused spi_init

Remove spi_init definition which never used on
respective code since from many years.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

drivers/net/e1000_spi.c

@@ -77,9 +77,6 @@ static inline struct e1000_hw *e1000_hw_from_spi(struct spi_slave *spi)
 	return container_of(spi, struct e1000_hw, spi);
 }
 
-/* Not sure why all of these are necessary */
-void spi_init(void)   { /* Nothing to do */ }
-
 struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 		unsigned int max_hz, unsigned int mode)
 {

drivers/spi/atmel_spi.c

@@ -34,11 +34,6 @@ static int spi_has_wdrbt(struct atmel_spi_slave *slave)
 	return (ATMEL_SPI_VERSION_REV(ver) >= 0x210);
 }
 
-void spi_init()
-{
-
-}
-
 struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 			unsigned int max_hz, unsigned int mode)
 {

drivers/spi/davinci_spi.c

@@ -388,11 +388,6 @@ void spi_cs_deactivate(struct spi_slave *slave)
 	/* do nothing */
 }
 
-void spi_init(void)
-{
-	/* do nothing */
-}
-
 struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 			unsigned int max_hz, unsigned int mode)
 {

drivers/spi/fsl_dspi.c

@@ -390,11 +390,6 @@ static int fsl_dspi_cfg_speed(struct fsl_dspi_priv *priv, uint speed)
 	return 0;
 }
 #ifndef CONFIG_DM_SPI
-void spi_init(void)
-{
-	/* Nothing to do */
-}
-
 int spi_cs_is_valid(unsigned int bus, unsigned int cs)
 {
 	if (((cs >= 0) && (cs < 8)) && ((bus >= 0) && (bus < 8)))

drivers/spi/fsl_espi.c

@@ -118,11 +118,6 @@ void spi_free_slave(struct spi_slave *slave)
 	free(fsl);
 }
 
-void spi_init(void)
-{
-
-}
-
 int spi_claim_bus(struct spi_slave *slave)
 {
 	struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);

drivers/spi/lpc32xx_ssp.c

@@ -47,15 +47,6 @@ static inline struct lpc32xx_spi_slave *to_lpc32xx_spi_slave(
 	return container_of(slave, struct lpc32xx_spi_slave, slave);
 }
 
-/* spi_init is called during boot when CONFIG_CMD_SPI is defined */
-void spi_init(void)
-{
-	/*
-	 *  nothing to do: clocking was enabled in lpc32xx_ssp_enable()
-	 * and configuration will be done in spi_setup_slave()
-	*/
-}
-
 /* the following is called in sequence by do_spi_xfer() */
 
 struct spi_slave *spi_setup_slave(uint bus, uint cs, uint max_hz, uint mode)

drivers/spi/mxc_spi.c

@@ -400,10 +400,6 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
 	return mxc_spi_xfer_internal(mxcs, bitlen, dout, din, flags);
 }
 
-void spi_init(void)
-{
-}
-
 /*
  * Some SPI devices require active chip-select over multiple
  * transactions, we achieve this using a GPIO. Still, the SPI

drivers/spi/mxs_spi.c

@@ -39,10 +39,6 @@ static inline struct mxs_spi_slave *to_mxs_slave(struct spi_slave *slave)
 	return container_of(slave, struct mxs_spi_slave, slave);
 }
 
-void spi_init(void)
-{
-}
-
 int spi_cs_is_valid(unsigned int bus, unsigned int cs)
 {
 	/* MXS SPI: 4 ports and 3 chip selects maximum */

drivers/spi/omap3_spi.c

@@ -461,11 +461,6 @@ static inline struct omap3_spi_priv *to_omap3_spi(struct spi_slave *slave)
 	return container_of(slave, struct omap3_spi_priv, slave);
 }
 
-void spi_init(void)
-{
-	/* do nothing */
-}
-
 void spi_free_slave(struct spi_slave *slave)
 {
 	struct omap3_spi_priv *priv = to_omap3_spi(slave);

drivers/spi/sh_qspi.c

@@ -247,11 +247,6 @@ void spi_cs_deactivate(struct spi_slave *slave)
 	sh_qspi_cs_deactivate(ss);
 }
 
-void spi_init(void)
-{
-	/* nothing to do */
-}
-
 struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 		unsigned int max_hz, unsigned int mode)
 {

drivers/spi/sh_spi.c

@@ -66,10 +66,6 @@ static int write_fifo_empty_wait(struct sh_spi *ss)
 	return 0;
 }
 
-void spi_init(void)
-{
-}
-
 static void sh_spi_set_cs(struct sh_spi *ss, unsigned int cs)
 {
 	unsigned long val = 0;

drivers/spi/soft_spi_legacy.c

@@ -36,13 +36,6 @@ static inline struct soft_spi_slave *to_soft_spi(struct spi_slave *slave)
 /*                         Public Functions                            */
 /*=====================================================================*/
 
-/*-----------------------------------------------------------------------
- * Initialization
- */
-void spi_init (void)
-{
-}
-
 struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 		unsigned int max_hz, unsigned int mode)
 {

include/spi.h

@@ -117,13 +117,6 @@ struct spi_slave {
 #define SPI_XFER_MMAP_END	BIT(3)	/* Memory Mapped End */
 };
 
-/**
- * Initialization, must be called once on start up.
- *
- * TODO: I don't think we really need this.
- */
-void spi_init(void);
-
 /**
  * spi_do_alloc_slave - Allocate a new SPI slave (internal)
  *