x86: first step of refactoring, introducing microcode_ops

Refactoring with the goal of having one general module and separate
vendor specific modules that hook into the general one.

Microcode_ops is a function pointer structure in which vendor
specific modules will enter all functions that differ between
vendors and that need to be accessed from the general module.
Signed-off-by: NPeter Oruba <peter.oruba@amd.com>
Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

include/asm-x86/microcode.h

+struct microcode_ops {
+	long (*get_next_ucode)(void **mc, long offset);
+	long (*microcode_get_next_ucode)(void **mc, long offset);
+	int (*get_matching_microcode)(void *mc, int cpu);
+	int (*apply_microcode_check_cpu)(int cpu);
+	int (*microcode_sanity_check)(void *mc);
+	int (*cpu_request_microcode)(int cpu);
+	void (*collect_cpu_info)(int cpu_num);
+	void (*apply_microcode)(int cpu);
+	void (*microcode_fini_cpu)(int cpu);
+	void (*clear_patch)(void *data);
+};
+
 struct microcode_header_intel {
 	unsigned int            hdrver;
 	unsigned int            rev;