spi: Add zynq spi controller driver

Zynq spi controller driver supports 2 buses and
3 chipselects on each bus.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Acked-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 019132e..91d24ce 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -39,6 +39,7 @@
 COBJS-$(CONFIG_TEGRA20_SLINK) += tegra20_slink.o
 COBJS-$(CONFIG_TEGRA114_SPI) += tegra114_spi.o
 COBJS-$(CONFIG_XILINX_SPI) += xilinx_spi.o
+COBJS-$(CONFIG_ZYNQ_SPI) += zynq_spi.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)