x86/microcode/intel: Print old and new revision during early boot

Make early loading message match late loading message and print both old
and new revisions.

This is helpful to know what the BIOS loaded revision is before an early
update.

Cache the early BIOS revision before the microcode update and have
print_ucode_info() print both the old and new revision in the same
format as microcode_reload_late().

  [ bp: Massage, remove useless comment. ]

Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230120161923.118882-6-ashok.raj@intel.com