Move HSI and GPIO muxing to board-tuna-modems.c
OMAP4: HSI: fix missing CAWAKE caused by modem wakeup spam trace

Removed trace every time modem wakes-up OMAP (can be several times per second).
This trace is called under interrupt context (PRCM int) and causes delay
in CAWAKE tasklet processing.

Change-Id: I4c856b0ff0f1b90cfe9fd0938441558ba59132a7
Reported-by: Gilles Bourgeois <gilles.bourgeois@renesasmobile.com>
Signed-off-by: Djamil Elaidi <d-elaidi@ti.com>