Update config files: re-enable twofish crypto support

Software twofish crypto support was disabled in several architectures
since openSUSE 10.3. For i386 and x86_64 it was on purpose, because
hardware-accelerated alternatives exist. However for all other
architectures it was by accident.

Re-enable software twofish crypto support in arm, ia64 and ppc
configuration files, to guarantee that at least one implementation is
always available (bnc#871325).