KVM: SVM: Drop VMXE check from svm_set_cr4()

Drop svm_set_cr4()'s explicit check CR4.VMXE now that common x86 handles
the check by incorporating VMXE into the CR4 reserved bits, via
kvm_cpu_caps.  SVM obviously does not set X86_FEATURE_VMX.

No functional change intended.
Signed-off-by: NSean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20201007014417.29276-4-sean.j.christopherson@intel.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/svm/svm.c

@@ -1687,9 +1687,6 @@ int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 	unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE;
 	unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;
 
-	if (cr4 & X86_CR4_VMXE)
-		return 1;
-
 	if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
 		svm_flush_tlb(vcpu);