Revert "misc: Mark MICROCODE_MINOR unused"

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 615efcf6 ("misc: Mark MICROCODE_MINOR
unused")

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

This reverts commit 615efcf6.

This revert is to recover old microcode interface /dev/cpu/microcode.

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