powerpc/913x: Add config flag for bootdelay

CONFIG_BOOTDELAY is missing from board header file. Add this macro
to enable counting down of auto boot.

Signed-off-by: Harninder Rai <harninder.rai@freescale.com>
[York Sun: Add commit message]
Reviewed-by: York Sun <yorksun@freescale.com>

include/configs/BSC9131RDB.h

@@ -433,6 +433,7 @@ extern unsigned long get_sdram_size(void);
 #define CONFIG_UBOOTPATH	"u-boot.bin" /* U-Boot image on TFTP server */
 
 #define CONFIG_BAUDRATE		115200
+#define CONFIG_BOOTDELAY	10 /* -1 disable auto-boot */
 
 #define	CONFIG_EXTRA_ENV_SETTINGS				\
 	"netdev=eth0\0"						\

include/configs/BSC9132QDS.h

@@ -675,6 +675,7 @@ combinations. this should be removed later
 #define CONFIG_UBOOTPATH	"u-boot.bin"
 
 #define CONFIG_BAUDRATE		115200
+#define CONFIG_BOOTDELAY	10 /* -1 disable auto-boot */
 
 #ifdef CONFIG_SDCARD
 #define CONFIG_DEF_HWCONFIG	"hwconfig=usb1:dr_mode=host,phy_type=ulpi\0"