am335x-evm: Fix bone pmic shut down over USB power

* Set DCDC2 to 1.2v for all power sources and board revs except for A1
* Set USB current trip point to 1300mA for all boards and power sources.
* Only Skip setting of MPU frequency to 720MHz for A1 and USB-powered boards.

Credits to Jason for noticing this. Tested with several reboots over USB on a Rev A2/3.

v2 changes:
Take care of not upping DCDC2 and LDO voltages for A1.
For A1- only operation done is to set the USB current limit.

Signed-off-by: Jason Kridner <jdk@ti.com>
Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
1 file changed