usb: xhci-mtk: remove declaration of xhci_mtk_setup()

Move xhci_driver_overrides struct variable after definition
of xhci_mtk_setup(), then we can remove it's declaration.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/cf627d611a5c59508371cc3360cb402b70825fd8.1615170625.git.chunfeng.yun@mediatek.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-mtk.c

@@ -344,15 +344,6 @@ static void usb_wakeup_set(struct xhci_hcd_mtk *mtk, bool enable)
 		usb_wakeup_ip_sleep_set(mtk, enable);
 }
 
-static int xhci_mtk_setup(struct usb_hcd *hcd);
-static const struct xhci_driver_overrides xhci_mtk_overrides __initconst = {
-	.reset = xhci_mtk_setup,
-	.check_bandwidth = xhci_mtk_check_bandwidth,
-	.reset_bandwidth = xhci_mtk_reset_bandwidth,
-};
-
-static struct hc_driver __read_mostly xhci_mtk_hc_driver;
-
 static int xhci_mtk_ldos_enable(struct xhci_hcd_mtk *mtk)
 {
 	int ret;
@@ -424,6 +415,14 @@ static int xhci_mtk_setup(struct usb_hcd *hcd)
 	return ret;
 }
 
+static const struct xhci_driver_overrides xhci_mtk_overrides __initconst = {
+	.reset = xhci_mtk_setup,
+	.check_bandwidth = xhci_mtk_check_bandwidth,
+	.reset_bandwidth = xhci_mtk_reset_bandwidth,
+};
+
+static struct hc_driver __read_mostly xhci_mtk_hc_driver;
+
 static int xhci_mtk_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;