x86/microcode: Clean up mc_cpu_down_prep()

mainline inclusion
from mainline-v6.7-rc1
commit ba48aa32388ac652256baa8d0a6092d350160da0
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I8XRMW


CVE: NA

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

This function has nothing to do with suspend. It's a hotplug
callback. Remove the bogus comment.

Drop the pointless debug printk. The hotplug core provides tracepoints
which track the invocation of those callbacks.

Intel-SIG: commit ba48aa32388a x86/microcode: Clean up mc_cpu_down_prep().
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/20231002115903.028651784@linutronix.de


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