Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/usb/mtu3/mtu3_dr.h b/drivers/usb/mtu3/mtu3_dr.h
index 50702fd..5e58c4d 100644
--- a/drivers/usb/mtu3/mtu3_dr.h
+++ b/drivers/usb/mtu3/mtu3_dr.h
@@ -71,6 +71,7 @@
 #if IS_ENABLED(CONFIG_USB_MTU3_DUAL_ROLE)
 int ssusb_otg_switch_init(struct ssusb_mtk *ssusb);
 void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb);
+void ssusb_mode_switch(struct ssusb_mtk *ssusb, int to_host);
 int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on);
 void ssusb_set_force_mode(struct ssusb_mtk *ssusb,
 			  enum mtu3_dr_force_mode mode);
@@ -85,6 +86,9 @@
 static inline void ssusb_otg_switch_exit(struct ssusb_mtk *ssusb)
 {}
 
+static inline void ssusb_mode_switch(struct ssusb_mtk *ssusb, int to_host)
+{}
+
 static inline int ssusb_set_vbus(struct otg_switch_mtk *otg_sx, int is_on)
 {
 	return 0;