Modifications to beagleboard setup to connect external maxtouch chip

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Fix ARM omap3beagle USB3320 detection

Please find a patch to fix ARM omap3beagle USB3320 detection due to bad pin mux config.
USB3320 reset is on uart2_rx/gpio_147 pin. This patch enable UART3 only instead all 4 UARTs for beagleboard (xM) to be able to get the uart2_rx/gpio_147 pin for the usb3320 reset.

Without this patch there are no USB (and no Ethernet which is on USB) on beagleboard xM since last kernel update.

This patch is based on Govindraj.R patch from:
http://www.spinics.net/lists/linux-omap/msg65427.html

Regards,

Guillaume

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>