usb: mtu3: fix failed runtime suspend in host only mode

When the dr_mode is "host", after the host enter runtime suspend,
the mtu3 can't do it, because the mtu3's device wakeup function is
not enabled, instead it's enabled in gadget init function, to fix
the issue, init wakeup early in mtu3's probe()

Fixes: 6b587394 ("usb: mtu3: support suspend/resume for dual-role mode")
Reviewed-by: NAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reported-by: NTianping Fang <tianping.fang@mediatek.com>
Signed-off-by: NChunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20220929064459.32522-1-chunfeng.yun@mediatek.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/mtu3/mtu3_core.c

@@ -978,8 +978,6 @@ int ssusb_gadget_init(struct ssusb_mtk *ssusb)
 		goto irq_err;
 	}
 
-	device_init_wakeup(dev, true);
-
 	/* power down device IP for power saving by default */
 	mtu3_stop(mtu);
 

drivers/usb/mtu3/mtu3_plat.c

@@ -356,6 +356,8 @@ static int mtu3_probe(struct platform_device *pdev)
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
 
+	device_init_wakeup(dev, true);
+
 	ret = ssusb_rscs_init(ssusb);
 	if (ret)
 		goto comm_init_err;