spi: Kconfig: Add Zynq QSPI controller entry

Add Zynq QSPI controller Kconfig entry.

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

drivers/spi/Kconfig

@@ -139,6 +139,15 @@ config ZYNQ_SPI
 	  access the SPI NOR flash on platforms embedding this Zynq
 	  SPI IP core.
 
+config ZYNQ_QSPI
+	bool "Zynq QSPI driver"
+	depends on ARCH_ZYNQ
+	help
+	  Enable the Zynq Quad-SPI (QSPI) driver. This driver can be
+	  used to access the SPI NOR flash on platforms embedding this
+	  Zynq QSPI IP core. This IP is used to connect the flash in
+	  4-bit qspi, 8-bit dual stacked and shared 4-bit dual parallel.
+
 endif # if DM_SPI
 
 config FSL_ESPI