[S390] cleanup facility list handling

Store the facility list once at system startup with stfl/stfle and
reuse the result for all facility tests.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/kvm/kvm-s390.c

@@ -740,7 +740,7 @@ static int __init kvm_s390_init(void)
 		kvm_exit();
 		return -ENOMEM;
 	}
-	stfle(facilities, 1);
+	memcpy(facilities, S390_lowcore.stfle_fac_list, 16);
 	facilities[0] &= 0xff00fff3f47c0000ULL;
 	return 0;
 }