usb-c: tcpc: Disable Dead Battery after system starts

The Dead Battery resistors interfere with port partner
detection. So, Dead Battery is disabled after the system
starts and sets the Rd or Rp resistors on the CC lines.

Tested on b_g474e_dpow1 with JP5 set to USBC.
Tested on stm32g081b_eval with JP17 set to D5V.

Signed-off-by: Sam Hurst <sbh1187@gmail.com>