usb: musb: Change end point selection to use new IO access

This allows the endpoints to work when multiple MUSB glue
layers are built in.

Cc: Fabio Baltieri <fabio.baltieri@linaro.org>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Apelete Seketeli <apelete@seketeli.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/musb_io.h

@@ -37,6 +37,8 @@
 
 #include <linux/io.h>
 
+#define musb_ep_select(_mbase, _epnum)	musb->io.ep_select((_mbase), (_epnum))
+
 /**
  * struct musb_io - IO functions for MUSB
  * @quirks:	platform specific flags