spi: Kconfig: Add ICH_SPI entry

Added ICH_SPI entry on Kconfig with help description.

Signed-off-by: Jagan Teki <jteki@openedev.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

drivers/spi/Kconfig

@@ -51,6 +51,13 @@ config FSL_QSPI
 	  used to access the SPI NOR flash on platforms embedding this
 	  Freescale IP core.
 
+config ICH_SPI
+	bool "Intel ICH SPI driver"
+	help
+	  Enable the Intel ICH SPI driver. This driver can be used to
+	  access the SPI NOR flash on platforms embedding this Intel
+	  ICH IP core.
+
 config SANDBOX_SPI
 	bool "Sandbox SPI driver"
 	depends on SANDBOX && DM