sf: Remove spi_flash_cmd_poll_bit()

There is no other call other than spi_flash_cmd_wait_ready(),
hence removed spi_flash_cmd_poll_bit and use the poll status code
spi_flash_cmd_wait_ready() itself.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

drivers/mtd/spi/spi_flash.c

@@ -194,13 +194,14 @@ int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
 	return ret;
 }
 
-int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
-			   u8 cmd, u8 poll_bit)
+int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
 {
 	struct spi_slave *spi = flash->spi;
 	unsigned long timebase;
 	int ret;
 	u8 status;
+	u8 poll_bit = STATUS_WIP;
+	u8 cmd = CMD_READ_STATUS;
 
 	ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
 	if (ret) {
@@ -231,12 +232,6 @@ int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
 	return -1;
 }
 
-int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
-{
-	return spi_flash_cmd_poll_bit(flash, timeout,
-		CMD_READ_STATUS, STATUS_WIP);
-}
-
 int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
 	u32 erase_size;

drivers/mtd/spi/spi_flash_internal.h

@@ -107,10 +107,6 @@ int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0);
 int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
 		size_t cmd_len, void *data, size_t data_len);
 
-/* Send a command to the device and wait for some bit to clear itself. */
-int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
-			   u8 cmd, u8 poll_bit);
-
 /*
  * Send the read status command to the device and wait for the wip
  * (write-in-progress) bit to clear itself.