Revert "x86/microcode: Default-disable late loading"

Intel inclusion
category: feature
feature: Backport Intel In Field Scan(IFS) multi-blob images support
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I6L337


CVE: N/A
Reference: N/A

Intel-SIG: Revert commit f5a968e7 ("x86/microcode: Default-disable
late loading")

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

This reverts commit f5a968e7.

This revert is to re-enable microcode late loading.

Signed-off-by: Aichun Shi <aichun.shi@intel.com>