gpio: sama5d2-piobu: drop of_match_ptr for ID table

The driver can match only via the DT table so the table should be always
used and the of_match_ptr does not have any sense (this also allows ACPI
matching via PRP0001, even though it might not be relevant here).

  drivers/gpio/gpio-sama5d2-piobu.c:230:34: error: ‘sama5d2_piobu_ids’ defined but not used [-Werror=unused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

drivers/gpio/gpio-sama5d2-piobu.c

@@ -236,7 +236,7 @@ MODULE_DEVICE_TABLE(of, sama5d2_piobu_ids);
 static struct platform_driver sama5d2_piobu_driver = {
 	.driver = {
 		.name		= "sama5d2-piobu",
-		.of_match_table	= of_match_ptr(sama5d2_piobu_ids)
+		.of_match_table	= sama5d2_piobu_ids,
 	},
 	.probe = sama5d2_piobu_probe,
 };