spi: add ti-ssp spi master driver

This patch adds an SPI master implementation that operates on top of an
underlying TI-SSP port.

Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index bb233a9c..42f5a8d 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -350,6 +350,16 @@
 	help
 	  SPI driver for NVidia Tegra SoCs
 
+config SPI_TI_SSP
+	tristate "TI Sequencer Serial Port - SPI Support"
+	depends on MFD_TI_SSP
+	help
+	  This selects an SPI master implementation using a TI sequencer
+	  serial port.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ti-ssp-spi.
+
 config SPI_TOPCLIFF_PCH
 	tristate "Topcliff PCH SPI Controller"
 	depends on PCI