[U-Boot] Rebase on u-boot-imx !

Hi iMXers, I was preparing to send my PR to Tom, but the request pull reveals that something went wrong. A lot of files not related to iMX was part of PR. I have tried to find the reason, but no way. I have then rebased u-boot-imx on Tom's (but not yet pushed to server), and applied all patches.

[U-Boot] Rebase on u-boot-imx !

Hi i.MXlers, rather after Tom merged Simon's DM branch, u-boot-imx had a lot of conflicts and it could not be pulled. I had to rebase it on current Tom's development tree, I apologize for the inconvenients. Best regards, Stefano Babic --