net: phy: mediatek: add the missing suspend/resume callbacks

Without suspend/resume callbacks, the PHY cannot be powered down/up
administratively.

Fixes: e40d2cca ("net: phy: add MediaTek Gigabit Ethernet PHY driver")
Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20210823044422.164184-1-dqfext@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/phy/mediatek-ge.c

@@ -81,6 +81,8 @@ static struct phy_driver mtk_gephy_driver[] = {
 		 */
 		.config_intr	= genphy_no_config_intr,
 		.handle_interrupt = genphy_handle_interrupt_no_ack,
+		.suspend	= genphy_suspend,
+		.resume		= genphy_resume,
 		.read_page	= mtk_gephy_read_page,
 		.write_page	= mtk_gephy_write_page,
 	},
@@ -93,6 +95,8 @@ static struct phy_driver mtk_gephy_driver[] = {
 		 */
 		.config_intr	= genphy_no_config_intr,
 		.handle_interrupt = genphy_handle_interrupt_no_ack,
+		.suspend	= genphy_suspend,
+		.resume		= genphy_resume,
 		.read_page	= mtk_gephy_read_page,
 		.write_page	= mtk_gephy_write_page,
 	},