x86: Remove PCID test that INVPCID isn't enabled without PCID

Drop the test that verifies INVPCID isn't enabled in the guest without
PCID also being enabled.  SVM allows !PCID && INVPCID, and VMX will soon
follow.

https://lkml.kernel.org/r/20210212003411.1102677-1-seanjc@google.com



Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210212010606.1118184-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>