x86/microcode: Rip out the OLD_INTERFACE

stable inclusion
from stable-v5.10.173
commit 9e56938f207241512aab787b17c88c96dc150b90
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8BFR3

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9e56938f207241512aab787b17c88c96dc150b90



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[ Upstream commit 181b6f40 ]

Everything should be using the early initrd loading by now.

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20220525161232.14924-2-bp@alien8.de


Stable-dep-of: c0dd9245 ("x86/microcode: Check CPU capabilities after late microcode update correctly")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>