reset: berlin: replace unsigned with unsigned int

Fixes a checkpatch warning:

  WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
  #55: FILE: drivers/reset/reset-berlin.c:55:
  +	unsigned offset, bit;
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

drivers/reset/reset-berlin.c

@@ -55,7 +55,7 @@ static const struct reset_control_ops berlin_reset_ops = {
 static int berlin_reset_xlate(struct reset_controller_dev *rcdev,
 			      const struct of_phandle_args *reset_spec)
 {
-	unsigned offset, bit;
+	unsigned int offset, bit;
 
 	offset = reset_spec->args[0];
 	bit = reset_spec->args[1];