Angus Ainslie authored Dec 23, 2020 and Martin Kepplinger committed Jan 18, 2021

Don't immediately set the data role, only set it in response the
negotiated value notification from the tps6589x. Otherwise data role
switch fails for DRP.

We only use values cached from the IRQ instead of poking I2C all
the time.

The update is moved in a function that will become more useful in later
commits.

Signed-off-by: Angus Ainslie <angus@akkea.ca>
Fixes: 18a6c866 ("usb: typec: tps6598x: Add USB role switching logic")