of: unittest: remove unneeded semicolon

Eliminate the following coccicheck warning:
./drivers/of/unittest.c:1961:2-3: Unneeded semicolon

Reported-by: Abaci Robot <[email protected]>
Signed-off-by: Yang Li <[email protected]>
Signed-off-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

drivers/of/unittest.c

@@ -1958,7 +1958,7 @@ static void of_unittest_remove_tracked_overlays(void)
 				__func__, overlay_name, ret);
 		}
 		of_unittest_untrack_overlay(save_ovcs_id);
-	};
+	}
 
 }