x86/microcode/amd: Cache builtin microcode too

mainline inclusion
from mainline-v6.7-rc1
commit d419d28261e72e1c9ec418711b3da41df2265139
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I8XRMW


CVE: NA

--------------------------------

save_microcode_in_initrd_amd() fails to cache builtin microcode and only
scans initrd.

Use find_blobs_in_containers() instead which covers both.

Intel-SIG: commit d419d28261e7 x86/microcode/amd: Cache builtin microcode too.
Microcode restructuring backport.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20231010150702.495139089@linutronix.de


[ Aubrey Li: amend commit log ]
Signed-off-by: Aubrey Li <aubrey.li@linux.intel.com>