PowerPc and RS6000 machine numbers.
* bfd-in2.h: Regenerate.
* coffcode.h (coff_set_arch_mach_hook): #ifdef XCOFF64, set arch
to bfd_arch_powerpc instead of bfd_arch_rs6000. Refer to PowerPc
and RS6000 machine numbers using #defined constants from
archures.c.
* cpu-powerpc.c (arch_info_struct): Refer to PowerPc and RS6000
machine numbers using #defined constants from archures.c. Add
entries for EC603e, 630, A35, RS64II, RS64III, 7400. Specify
64-bit words in 620 entry.
* cpu-rs6000.c (arch_info_struct): Create with entries for RS1,
RSC, and RS2.
(bfd_rs6000_arch): Change default machine to 0 (bfd_mach_rs6k).
