x86/microcode/intel: Simplify and rename generic_load_microcode()

mainline inclusion
from mainline-v6.7-rc1
commit 6b072022ab2e1e83b7588144ee0080f7197b71da
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I8XRMW


CVE: NA

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

so it becomes less obfuscated and rename it because there is nothing
generic about it.

Intel-SIG: commit 6b072022ab2e x86/microcode/intel: Simplify and rename generic_load_microcode().
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/20231002115902.330295409@linutronix.de


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