[U-Boot] Kernel hang when replace older uboot with uboot master V2

[rosysong at rosinson.com]

Thanks for your reply, but this firmware can find the rootfs itself, 

>[    0.337492] 5 fixed-partitions partitions found on MTD device spi0.0
>[    0.344060] Creating 5 MTD partitions on "spi0.0":
>[    0.349014] 0x000000000000-0x000000040000 : "u-boot"
>[    0.354834] 0x000000040000-0x000000050000 : "u-boot-env"
>[    0.360944] 0x000000050000-0x000000060000 : "factory"
>[    0.366831] 0x000000060000-0x000000fe0000 : "firmware"
>[    0.374973] 2 uimage-fw partitions found on MTD device firmware
>[    0.381090] Creating 2 MTD partitions on "firmware":
>[    0.386258] 0x000000000000-0x000000190000 : "kernel"
>[    0.392027] 0x000000190000-0x000000f80000 : "rootfs"
>[    0.397783] mtd: device 5 (rootfs) set to be root filesystem