processing. Add a "common" procfs_machdep.c for PowerPC platforms.
Even though it is supposed to be port specific, most (if not all)
PowerPC ports can just use the common one.
reference while relocation is disabled since the stack will be inaccessible.
Add support for using AltiVec in pmap_zero_page and pmap_copy_page on
AltiVec capable processors.
Move the trap/vector initialization for MPC6xx ports to mpc6xx_machdep.c
Also move softnet, install_extintr, mapiodev, kvtop. Add common BAT
initialization code.
Add user Altivec support.
Fix calls to OF_call_method in macppc/macppc/machdep.c.
Use ci_fpuproc in cpu_info instead of separate fpuproc.
Add separate syscall.c and defined __HAVE_SYSCALL_INTERN.