x86/AMD-ucode: correct multiple container handling

x86/AMD-ucode: correct multiple container handling

Avoid emitting an error message referring to an incorrect or corrupt
container file just because no entry was found for the running CPU.

Additionally switch the order of data validation and consumption in
cpu_request_microcode()'s first loop, and also check the types of
skipped blocks in container_fast_forward().

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
Release-Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>