[PATCH] Enable -mcpu=power6 for PowerPC

[David Edelsohn]

	* invoke.texi: add cpu_type power6
	* config.gcc: add cpu_type power6
	* rs6000.c (rs6000_override_options): alias power6 to power5+
	plus altivec
	* aix52.h: add ASM definitions for power6
	* rs6000.h: add ASM definitions for power6

Okay.

	The aix52.h and rs6000.h ChangeLog entries should refer to
ASM_CPU_SPEC, e.g.,

        * config/rs6000/aix52.h (ASM_CPU_SPEC): Add power6.

and the ChangeLog entry filenames should use complete paths, e.g.,
doc/invoke.texi and config/rs6000/rs6000.c.

	Also, it helps to insert the ChangeLog in the body of the message,
not just the attachment.

Thanks, David