Davinci: Configurable NAND chip selects

Davinci: Configurable NAND chip selects

Add a CONFIG_SYS_NAND_CS setting to all davinci configs and
use it to setup the NAND controller in the davinci_nand
mtd driver.

Signed-off-by: Nick Thompson <nick.thompson@gefanuc.com>
diff --git a/include/configs/davinci_dm355leopard.h b/include/configs/davinci_dm355leopard.h
index ca3dea4..e09fb75 100644
--- a/include/configs/davinci_dm355leopard.h
+++ b/include/configs/davinci_dm355leopard.h
@@ -65,6 +65,7 @@
 
 /* NAND */
 #define CONFIG_NAND_DAVINCI
+#define CONFIG_SYS_NAND_CS		2
 #define CONFIG_SYS_NAND_USE_FLASH_BBT
 #define CONFIG_SYS_NAND_HW_ECC