net: aquantia: Make function aq_fw1x_set_power() static

Fixes the following sparse warning:

drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c:873:5: warning:
 symbol 'aq_fw1x_set_power' was not declared. Should it be static?

Fixes: a0da96c0 ("net: aquantia: implement WOL support")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c

@@ -870,7 +870,7 @@ static int aq_fw1x_set_wol(struct aq_hw_s *self, bool wol_enabled, u8 *mac)
 	return err;
 }
 
-int aq_fw1x_set_power(struct aq_hw_s *self, unsigned int power_state,
+static int aq_fw1x_set_power(struct aq_hw_s *self, unsigned int power_state,
 			     u8 *mac)
 {
 	struct hw_atl_utils_fw_rpc *prpc = NULL;