Merge branch 'next' of /home/wd/git/u-boot/next

Conflicts:
include/ppc4xx.h

Signed-off-by: Wolfgang Denk <wd@denx.de>

Add basic errno support.

Needed for hash table support; probably useful in a lot of other
places as well.

Signed-off-by: Wolfgang Denk <wd@denx.de>