cpuid.h (__cpuid_count): New defines.

	* config/i386/cpuid.h (__cpuid_count): New defines.
	* config/i386/driver-i386.c (struct cache_desc): New structure.
	(describe_cache): Use struct cache_desc to pass cache descriptions.
	(detect_l2_cache): Ditto. Rename from decode_l2_cache.
	(detect_caches_amd): Use struct cache_desc to describe caches.
	(decode_caches_intel): Use struct cache_desc to pass cache
	descriptions.  Update descriptions to match latest (rev -032,
	December 2007) CPUID documentation.  Do not check valid bit here.
	Check for Xeon MP value 0x49 problems.
	(detect_caches_cpuid2): New function, split from detect_caches_intel.
	Check valid bit before calling decode_caches_intel.  Detect number
	of times to repeat CPUID instruction.
	(detect_caches_cpuid4): New function.
	(detect_caches_intel): Depending on max_level, call
	detect_caches_cpuid2 or detect_caches_cpuid4.  Call detect_l2_cache
	only when other methods fail to provide valid L2 cache description.

From-SVN: r141064