gpio: zynq: Simplify with device_get_match_data()

gpio: zynq: Simplify with device_get_match_data()

Driver's probe function matches against driver's of_device_id table,
where each entry has non-NULL match data, so of_match_node() can be
simplified with device_get_match_data().

While changing the error message, switch to dev_err_probe() so error
path is a bit simpler.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20251219-gpio-of-match-v3-3-6b84194a02a8@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>