andes_spi: add andes_spi interface

andes_spi is an spi interface developed by Andes Tech.

Signed-off-by: Macpaul Lin <macpaul@andestech.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Mike Frysinger <vapier@gentoo.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index a9b1ca4..96c9642 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -26,6 +26,7 @@
 LIB	:= $(obj)libspi.o
 
 COBJS-$(CONFIG_ALTERA_SPI) += altera_spi.o
+COBJS-$(CONFIG_ANDES_SPI) += andes_spi.o
 COBJS-$(CONFIG_ATMEL_DATAFLASH_SPI) += atmel_dataflash_spi.o
 COBJS-$(CONFIG_ATMEL_SPI) += atmel_spi.o
 COBJS-$(CONFIG_BFIN_SPI) += bfin_spi.o