spi: add support for Renesas RSPI

The SH7757 has RSPI module. This patch supports it.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

drivers/spi/Kconfig

@@ -279,6 +279,12 @@ config SPI_PXA2XX
 config SPI_PXA2XX_PCI
 	def_bool SPI_PXA2XX && X86_32 && PCI
 
+config SPI_RSPI
+	tristate "Renesas RSPI controller"
+	depends on SUPERH
+	help
+	  SPI driver for Renesas RSPI blocks.
+
 config SPI_S3C24XX
 	tristate "Samsung S3C24XX series SPI"
 	depends on ARCH_S3C2410 && EXPERIMENTAL

drivers/spi/Makefile

@@ -44,6 +44,7 @@ obj-$(CONFIG_SPI_PL022)			+= spi-pl022.o
 obj-$(CONFIG_SPI_PPC4xx)		+= spi-ppc4xx.o
 obj-$(CONFIG_SPI_PXA2XX)		+= spi-pxa2xx.o
 obj-$(CONFIG_SPI_PXA2XX_PCI)		+= spi-pxa2xx-pci.o
+obj-$(CONFIG_SPI_RSPI)			+= spi-rspi.o
 obj-$(CONFIG_SPI_S3C24XX)		+= spi-s3c24xx-hw.o
 spi-s3c24xx-hw-y			:= spi-s3c24xx.o
 spi-s3c24xx-hw-$(CONFIG_SPI_S3C24XX_FIQ) += spi-s3c24xx-fiq.o