x86: moved Intel microcode patch loader declarations to seperate header file

Intel specific microcode declarations have been moved to a seperate header file.
There are no code changes to the code itself and no side effects to other parts.

Signed-off-by: Peter Oruba <peter.oruba@amd.com>
Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>