usb: musb: Remove duplicate declaration of functions

Remove duplicate declaration of below functions in musb_host.h
	musb_host_cleanup
	musb_host_tx
	musb_host_rx
	musb_root_disconnect
Signed-off-by: Saurav Girepunje <saurav.girepunje@gmail.com>
Link: https://lore.kernel.org/r/20210508093512.GA11194@userSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/musb/musb_host.h

@@ -61,10 +61,6 @@ extern void musb_host_tx(struct musb *, u8);
 extern void musb_host_rx(struct musb *, u8);
 extern void musb_root_disconnect(struct musb *musb);
 extern void musb_host_free(struct musb *);
-extern void musb_host_cleanup(struct musb *);
-extern void musb_host_tx(struct musb *, u8);
-extern void musb_host_rx(struct musb *, u8);
-extern void musb_root_disconnect(struct musb *musb);
 extern void musb_host_resume_root_hub(struct musb *musb);
 extern void musb_host_poke_root_hub(struct musb *musb);
 extern int musb_port_suspend(struct musb *musb, bool do_suspend);