reset: hi6220: Make reset_control_ops const

The hi6220_reset_ops structure is never modified. Make it const.

Signed-off-by: Philipp Zabel <[e-mail]>

drivers/reset/hisilicon/hi6220_reset.c

···
 	return 0;
 }
 
-static struct reset_control_ops hi6220_reset_ops = {
+static const struct reset_control_ops hi6220_reset_ops = {
 	.assert = hi6220_reset_assert,
 	.deassert = hi6220_reset_deassert,
 };