Merge tag 'bk3' of https://github.com/sverdlin/ep93xx into next/soc

Pull "ARM: ep93xx: ts72xx: Add support for BK3 board" from Alexander Sverdlin:

This patch series adds support for Liebherr's BK3 board, being
a derivative of TS72XX design.

* tag 'bk3' of https://github.com/sverdlin/ep93xx:
  ARM: ep93xx: ts72xx: Add support for BK3 board - ts72xx derivative
  ARM: ep93xx: ts72xx: cosmetic: Add some description to ts72xx code
  ARM: ep93xx: ts72xx: Rewrite ts72xx_register_flash() to accept parameters
  ARM: ep93xx: ts72xx: Provide include guards for ts72xx.h file