[U-Boot] sunxi:Updated A31 & A31-mele i7 support

[Ian Campbell]

On Thu, 2015-06-25 at 18:20 +0800, 加特技的肖特基 wrote:
> I fixed SUNXI_MMCSLOT support and update the mele i7 mod-emmc support~

As I requested in the earlier private mail, please make multiple changes
using multiple patches, not all wedged into one.

> Eh..I don't know what the sign-off is~

The first hit on google for "u-boot signed-off" for me was
http://www.denx.de/wiki/U-Boot/DevelopmentProcess and the second was
http://www.denx.de/wiki/U-Boot/Patches

Ian.