zynq-common: Enable zynq qspi controller support

This patch adds support for zynq qspi controller driver
on zynq-common.h

Signed-off-by: Jagan Teki <jteki@openedev.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Tested-by: Jagan Teki <jteki@openedev.com>

include/configs/zynq-common.h

@@ -72,6 +72,15 @@
 # define CONFIG_CMD_SF
 #endif
 
+/* QSPI */
+#ifdef CONFIG_ZYNQ_QSPI
+# define CONFIG_SF_DEFAULT_SPEED	30000000
+# define CONFIG_SPI_FLASH_SPANSION
+# define CONFIG_SPI_FLASH_STMICRO
+# define CONFIG_SPI_FLASH_WINBOND
+# define CONFIG_CMD_SF
+#endif
+
 /* NOR */
 #ifndef CONFIG_SYS_NO_FLASH
 # define CONFIG_SYS_FLASH_BASE		0xE2000000