Enabled microcode late loading as default for x86 in openeuler_defconfig

Intel inclusion
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I873BU


CVE: N/A

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Intel-SIG: openeuler_defconfig: Enabled microcode late loading
as default for x86 in openeuler_defconfig.
Backport x86/microcode related patches from 5.10.173 upstream.

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Enabled microcode late loading as default for x86 in openeuler_defconfig

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