mtd: ofpart: Replicate mtd cmdline "lk" option with device tree "lock" property

The mtd partition command line parser already supports a "lk" option to mask
MTD_POWERUP_LOCK. This extends that same functionality to device tree
partition specifications.
Signed-off-by: Josh Radel <jradel@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

drivers/mtd/ofpart.c

@@ -71,7 +71,10 @@ static int parse_ofpart_partitions(struct mtd_info *master,
 		(*pparts)[i].name = (char *)partname;
 
 		if (of_get_property(pp, "read-only", &len))
-			(*pparts)[i].mask_flags = MTD_WRITEABLE;
+			(*pparts)[i].mask_flags |= MTD_WRITEABLE;
+
+		if (of_get_property(pp, "lock", &len))
+			(*pparts)[i].mask_flags |= MTD_POWERUP_LOCK;
 
 		i++;
 	}