uboot-mediatek: enable rootwait for jdcloud re-cp-03

Sometimes the mmc deivce may come up later than kernel attempts to
mount rootfs, resulting kernel panic. Enable rootwait to fix it.

Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>

package/boot/uboot-mediatek/patches/441-add-jdcloud_re-cp-03.patch

@@ -271,7 +271,7 @@
 +serverip=192.168.1.254
 +loadaddr=0x46000000
 +console=earlycon=uart8250,mmio32,0x11002000 console=ttyS0
-+bootargs=root=/dev/mmcblk0p65
++bootargs=root=/dev/mmcblk0p65 rootwait
 +bootcmd=if pstore check ; then run boot_recovery ; else run boot_emmc ; fi
 +bootconf=config-1
 +bootdelay=0