nSVM: Test illegal combinations of EFER.LME, CR0.PG, CR0.PE and CR4.PAE in VMCB

According to section "Canonicalization and Consistency Checks" in APM vol. 2
the following guest state combinations are illegal:

	* EFER.LME and CR0.PG are both set and CR4.PAE is zero.
	* EFER.LME and CR0.PG are both non-zero and CR0.PE is zero.
	* EFER.LME, CR0.PG, CR4.PAE, CS.L, and CS.D are all non-zero

Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Message-Id: <20200812002935.48365-2-krish.sadhukhan@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>