pinctrl: cherryview: Simplify code with cleanup helpers

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

Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Author: andy-shev