spi: Add AD-FMCOMMS1-EBZ I2C-SPI bridge driver

This patch adds support for the I2C-SPI bridge which can be found on the Analog
Devices AD-FMCOMMS1-EBZ board.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 0a72569..12468e5 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -384,6 +384,13 @@
 	help
 	  SPI driver for Toshiba TXx9 MIPS SoCs
 
+config SPI_XCOMM
+	tristate "Analog Devices AD-FMCOMMS1-EBZ SPI-I2C-bridge driver"
+	depends on I2C
+	help
+	  Support for the SPI-I2C bridge found on the Analog Devices
+	  AD-FMCOMMS1-EBZ board.
+
 config SPI_XILINX
 	tristate "Xilinx SPI controller common module"
 	depends on HAS_IOMEM && EXPERIMENTAL