USB-C: Handle PD at boot
On device probe:
- tps65982 driver did not read the active PD contract at all, always defaulting to 500mA instead
- bq25896 driver did not check tps65982 status if tps was probed first and left IINLIM at previous value in such case
This MR aims to fix both issues, which should fix possible slow charging when booting with PD charger attached.
Closes #267 (closed)