Merge branch 'staging' of https://source.denx.de/u-boot/custodians/u-boot-tegra

Assorted Tegra enhancements. Merged with the recent XPL_BUILD changes,
resolve some whitespace issues and fix the name of the new apalis-tk1
env file by Tom.

Signed-off-by: Tom Rini <trini@konsulko.com>