Get rid of custom microcode caching in MPinit and SGX code and use the caching introduced in intel_microcode_find() instead. Change-Id: If3ccd4dcff221c88839ffeafa812f4c38cede63f Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/49897 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Angel Pons <th3fanbus@gmail.com>