KVM: x86: remove bogus #GP injection

There is no need to inject a #GP from kvm_mtrr_set_msr, kvm_emulate_wrmsr will
handle it.
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/mtrr.c

@@ -84,12 +84,8 @@ bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data)
 	} else
 		/* MTRR mask */
 		mask |= 0x7ff;
-	if (data & mask) {
-		kvm_inject_gp(vcpu, 0);
-		return false;
-	}
 
-	return true;
+	return (data & mask) == 0;
 }
 EXPORT_SYMBOL_GPL(kvm_mtrr_valid);