KVM: X86: Do the same ignore_msrs check for feature msrs

Logically the ignore_msrs and report_ignored_msrs should also apply to feature
MSRs.  Add them in.

Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20200622220442.21998-3-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>