Merge branch 'master' of https://source.denx.de/u-boot/custodians/u-boot-sh

These are mainly DBSC5 DRAM controller specific fixes and updates for
current release. There is the long overdue BL31 start V4H board code as
well, that should be in the current release to make the V4H White Hawk
board usable with SPL, and a fallback U-Boot PSCI implementation
enablement to make sure the board always boots. And finally, there are
two comment fixes.