usb: mtu3: return successful suspend status

Forgot 'return 0;' when suspend successfully, make the mistake
when I split patches.

Fixes: 6b58739 ("usb: mtu3: support suspend/resume for dual-role mode")
Signed-off-by: Chunfeng Yun <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Chunfeng Yun

drivers/usb/mtu3/mtu3_plat.c

@@ -502,6 +502,7 @@ static int mtu3_suspend_common(struct device *dev, pm_message_t msg)
 	ssusb_phy_power_off(ssusb);
 	clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);
 	ssusb_wakeup_set(ssusb, true);
+	return 0;
 
 sleep_err:
 	resume_ip_and_ports(ssusb, msg);