gpio: cdev: Correct return code on memory allocation failure

gpio: cdev: Correct return code on memory allocation failure

commit faff6846474e99295a139997f93ef6db222b5cee upstream.

-ENOMEM is a more appropriate return code for memory allocation
failures.  Correct it.

Cc: stable@vger.kernel.org
Fixes: 20bddcb40b2b ("gpiolib: cdev: replace locking wrappers for gpio_device with guards")
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20260116081036.352286-6-tzungbi@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>