s390/smp: fix memblock_phys_free() vs memblock_free() confusion

memblock_phys_free() is used on a virtual address. Fix this by using
memblock_free().

Note: this doesn't fix a bug currently, since virtual and physical
addresses are identical.
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/kernel/smp.c

@@ -880,7 +880,7 @@ void __init smp_detect_cpus(void)
 
 	/* Add CPUs present at boot */
 	__smp_rescan_cpus(info, true);
-	memblock_phys_free((unsigned long)info, sizeof(*info));
+	memblock_free(info, sizeof(*info));
 }
 
 /*