[Patch AArch64 3/3] Fix up for pr70133

[Patch AArch64 3/3] Fix up for pr70133

gcc/

	PR target/70133
	* config/aarch64/driver-aarch64.c
	(aarch64_get_extension_string_for_isa_flags): New.
	(arch_extension): Rename to...
	(aarch64_arch_extension): ...This.
	(ext_to_feat_string): Rename to...
	(aarch64_extensions): ...This.
	(aarch64_core_data): Keep track of architecture extension flags.
	(cpu_data): Rename to...
	(aarch64_cpu_data): ...This.
	(aarch64_arch_driver_info): Keep track of architecture extension
	flags.
	(get_arch_name_from_id): Rename to...
	(get_arch_from_id): ...This, change return type.
	(host_detect_local_cpu): Update and reformat for renames, handle
	extensions through common infrastructure.

From-SVN: r234877