s390/sclp: 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>

drivers/s390/char/sclp_early.c

@@ -139,7 +139,7 @@ int __init sclp_early_get_core_info(struct sclp_core_info *info)
 	}
 	sclp_fill_core_info(info, sccb);
 out:
-	memblock_phys_free((unsigned long)sccb, length);
+	memblock_free(sccb, length);
 	return rc;
 }