gpio: intel-mid: switch to devm_gpiochip_add_data()

The error handling is not correct since the commit 3f7dbfd8 ("gpio:
intel-mid: switch to using gpiolib irqchip helpers"). Switch to devres API to
fix the potential resource leak.

Fixes: commit 3f7dbfd8 ("gpio: intel-mid: switch to using gpiolib irqchip helpers")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>