[HAL]

Cleanup part 1/x
- Rename each architectures default hal to "hal" and delete the stubbed "hal" module.
- Delete halamd64 (will later reuse the x86 hal)
- Rename "halmp" to "halmps" as it's called on windows
- Set HalInitSystem as entry point
- Move pcibus.c into hal_generic.rbuild
- Use a common .pspec file
- Use a directory.rbuild for halx86 as it was done for the other architectures already
- Move some code from hal_generic to hal_generic_up
- No code change

svn path=/trunk/; revision=45195