pinctrl: lynxpoint: Use %pR to print IO resource

Replace explicit casting by pointer to struct resource with
specifier replacement to %pR to print the IO resource.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>