Extend and enable PTN5150 driver

- Add optional support for i2c interrupts, enabled if the device tree
provides an I2C irq.
- Make CON_DET interrupt optional, will be enabled if the device tree
provides a GPIO for it.
- Other miscellaneous cleanups
- Device tree entries to enable on phanbell, and set as the extcon for
DWC3.

Change-Id: Ib015f7f549d10c28153f281c11c806212c8d9583
1 file changed