driver-i386.c (host_detect_local_cpu): Set PROCESSOR_K8 for signature_CENTAUR_ebx...

driver-i386.c (host_detect_local_cpu): Set PROCESSOR_K8 for signature_CENTAUR_ebx with has_longmode.

	* config/i386/driver-i386.c (host_detect_local_cpu): Set
	PROCESSOR_K8 for signature_CENTAUR_ebx with has_longmode.
	<case PROCESSOR_K8>: Pass nano-3000, nano, eden-x2 or k8 for
	signature_CENTAUR_ebx.
	* config/i386/i386.c (ix86_option_override_internal): Add
	definitions for VIA c7, samuel-2, nehemiah, esther, eden-x2, eden-x4,
	nano, nano-1000, nano-2000, nano-3000, nano-x2 and nano-x4.
	* doc/invoke.texi: Document new VIA -march entries.

From-SVN: r237534