[U-Boot] [PATCH 0/6] SPL: Port SPL framework to powerpc

This patchset ports the SPL framework to powerpc. Its based on the SPL generalization lately done by Tom Rini. The patches can be applied on top of his 3rd version located here:

http://github.com/trini/u-boot WIP/spl-improvements

Additionally, a new MPC5200 board port is included, the a3m071 board port. This board port uses this SPL framework mainly to speed up booting into the OS (Linux of course). Detection of Linux vs. U-Boot booting is done here by checking the environment variable "boot_os". If "boot_os" is set to "yes", then the OS (Linux) is booted. Otherwise the "real" U-Boot is booted. For this env checking in the SPL, a small restructuring of the env code has been done.

Comments welcome!

Thanks, Stefan