spi: s3c64xx: add support for exynos7 SPI controller

Exynos7 SPI controller supports only the auto Selection of
CS toggle mode and Exynos7 SoC includes six SPI controllers.
Add support for these changes in Exynos7 SPI controller driver.

Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 84e7c9e..de2d33d 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -444,7 +444,7 @@
 
 config SPI_S3C64XX
 	tristate "Samsung S3C64XX series type SPI"
-	depends on PLAT_SAMSUNG
+	depends on (PLAT_SAMSUNG || ARCH_EXYNOS)
 	select S3C64XX_PL080 if ARCH_S3C64XX
 	help
 	  SPI driver for Samsung S3C64XX and newer SoCs.