1. Reset or remove values for config symbols that were only
configurable if EXPERT.
2. Set additional configurable symbols to their default values.
This should have no effect on the actual configuration, except for
sh4 where EXPERT is *always* set and so the settings in 1 were
still being followed.
svn path=/dists/trunk/linux/; revision=20825
Leave it enabled for armel/{iop32x,ixp4xx,kirkwood,orion5x} and m68k.
Drop the workaround patch for powerpc.
svn path=/dists/sid/linux/; revision=20732