[PATCH 3/3] i2c/at91: adopt pinctrl support

Wenyou Yang [off-list ref] writes:

Amend the i2c at91 pin controller to optionally take a pin control
handle and set the state of the pins to:

- "default" on boot, resume and before performing an transfer
- "sleep" on suspend()

This should make it possible to optimize energy usage for the pins
both for the suspend/resume cycle

Signed-off-by: Wenyou Yang <redacted>

This patch is a good example of why you should just have the ->suspend
function call the same function as ->runtime_suspend.

If you do that, rather than having to add the pinctrl_pm* calls bo both
system PM and runtime PM functions, you could've just added them to the
runtime PM functions.

Kevin