* archures.c (enum bfd_architecture): #define constants for

	* archures.c (enum bfd_architecture): #define constants for
	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).