This patch enables USB-OTG support with serranoltexx devices.

A Y-USB-OTG cable is needed for using USB-OTG with that devices,
beause voltage must supplied separatley.

The idea of this patch has the origin on otg patch for f4ktion's kernel.
See here:
https://github.com/F4k/f4ktion_kernel/commit/e87234357a045a74a00e1f212bb7e20d54e5e694
https://github.com/F4k/f4ktion_kernel/commit/8893a51d35c6867d464db746dc20295234f8c050

Change-Id: Id07167b4f2e459500a7316ddd204b0331c1ba23f