x86/microcode/intel: Cleanup code further

commit 0177669e upstream

Sanitize the microcode scan loop, fixup printks and move the loading
function for builtin microcode next to the place where it is used and mark
it __init.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20231002115902.389400871@linutronix.de


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>