spi: Add driver for IMG SPFI controller

Add support for the Synchronous Peripheral Flash Interface (SPFI) master
controller found on IMG SoCs.  The SPFI controller supports 5 chip-select
lines and single/dual/quad mode SPI transfers.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 84e7c9e..98de207 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -225,6 +225,13 @@
 	  GPIO operations, you should be able to leverage that for better
 	  speed with a custom version of this driver; see the source code.
 
+config SPI_IMG_SPFI
+	tristate "IMG SPFI controller"
+	depends on MIPS || COMPILE_TEST
+	help
+	  This enables support for the SPFI master controller found on
+	  IMG SoCs.
+
 config SPI_IMX
 	tristate "Freescale i.MX SPI controllers"
 	depends on ARCH_MXC || COMPILE_TEST