Change user configurable booting init

WindCharger booting sequence will be:
1. kernel start $(init) from kernel cmdline
2. $(init) start inits and trigger sysv init @ /sbin/init
3. sysv init take over

The original init script in uboot is /sbin/init, change it
to /init. /sbin/init is used for sysv init.

Change-Id: If15242f49a95791610e9e5af2d5381faaa8d9dd0
diff --git a/include/configs/board953x.h b/include/configs/board953x.h
index dbc7ed7..7de9818 100755
--- a/include/configs/board953x.h
+++ b/include/configs/board953x.h
@@ -269,7 +269,7 @@
 #define CONFIG_EXTRA_ENV_SETTINGS	\
 	"dir=\0" "ACTIVATED_KERNEL_NAME=kernel0\0" ATH_U_CMD ATH_F_CMD ATH_K_CMD ""
 
-#define	CONFIG_BOOTARGS		"console=ttyS0,115200 root=" ATH_ROOT_DEV " rootfstype=squashfs init=/sbin/init " MTDPARTS_DEFAULT
+#define	CONFIG_BOOTARGS		"console=ttyS0,115200 root=" ATH_ROOT_DEV " rootfstype=squashfs init=/init " MTDPARTS_DEFAULT
 
 //#define CFG_PLL_FREQ    CFG_PLL_720_600_200
 
@@ -296,7 +296,7 @@
 #			define __WC_BOOTARGS_CONSOLE "console=ttyS0,115200"
 #			define __WC_BOOTARGS_PART_DEFS \
 					"rootfstype=squashfs \
-init=/sbin/init \
+init=/init \
 \
 mtdparts=ath-nor0:\
 320k(loader),\