pinctrl: baytrail: Simplify code with cleanup helpers

Use macros defined in linux/cleanup.h to automate resource lifetime
control in the driver.

Reviewed-by: Linus Walleij <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>
Acked-by: Mika Westerberg <[email protected]>

Author: andy-shev