[U-Boot] Patches for boot using FAT file system for beaglebone black

Hi all,I have been using u-boot 2014.10 for a while on my beaglebone black with two features I added.1. boot from a FAT file system on mmc partition.2. output the MMC interface (0 or 1) just booted from. Today I downloaded the version 2015.10 and modified it with the same features, and it works.Please refer to the attached patch file from git format-patch Regards,Dashi Cao