imx: mx6qarm2: Change the mmcroot and mmcpart env value

1. Set the image load partition to the first FAT partition.
2. Set the kernel rootfs partition to the second partition.

Signed-off-by: Ye.Li <B37916@freescale.com>

include/configs/mx6qarm2.h

@@ -83,8 +83,8 @@
 	"boot_fdt=try\0" \
 	"ip_dyn=yes\0" \
 	"mmcdev=1\0" \
-	"mmcpart=2\0" \
-	"mmcroot=/dev/mmcblk0p3 rootwait rw\0" \
+	"mmcpart=1\0" \
+	"mmcroot=/dev/mmcblk0p2 rootwait rw\0" \
 	"mmcargs=setenv bootargs console=${console},${baudrate} " \
 		"root=${mmcroot}\0" \
 	"loadbootscript=" \