KVM/x86: Fix wrong macro references of X86_CR0_PG_BIT and X86_CR4_PAE_BIT in kvm_valid_sregs()

kvm_valid_sregs() should use X86_CR0_PG and X86_CR4_PAE to check bit
status rather than X86_CR0_PG_BIT and X86_CR4_PAE_BIT. This patch is
to fix it.

Fixes: f2981033(KVM/x86: Check input paging mode when cs.l is set)
Reported-by: Jeremi Piotrowski <jeremi.piotrowski@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

arch/x86/kvm/x86.c

@@ -7496,13 +7496,13 @@ EXPORT_SYMBOL_GPL(kvm_task_switch);
 
 int kvm_valid_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 {
-	if ((sregs->efer & EFER_LME) && (sregs->cr0 & X86_CR0_PG_BIT)) {
+	if ((sregs->efer & EFER_LME) && (sregs->cr0 & X86_CR0_PG)) {
 		/*
 		 * When EFER.LME and CR0.PG are set, the processor is in
 		 * 64-bit mode (though maybe in a 32-bit code segment).
 		 * CR4.PAE and EFER.LMA must be set.
 		 */
-		if (!(sregs->cr4 & X86_CR4_PAE_BIT)
+		if (!(sregs->cr4 & X86_CR4_PAE)
 		    || !(sregs->efer & EFER_LMA))
 			return -EINVAL;
 	} else {