pwm: rcar: 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). This
also fixes the following compiler warning:

  drivers/pwm/pwm-rcar.c:252:34: error: ‘rcar_pwm_of_table’ defined but not used [-Werror=unused-const-variable=]

for builds with CONFIG_OF=n, CONFIG_PWM_RCAR=y and W=1.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-rcar.c

@@ -258,7 +258,7 @@ static struct platform_driver rcar_pwm_driver = {
 	.remove_new = rcar_pwm_remove,
 	.driver = {
 		.name = "pwm-rcar",
-		.of_match_table = of_match_ptr(rcar_pwm_of_table),
+		.of_match_table = rcar_pwm_of_table,
 	}
 };
 module_platform_driver(rcar_pwm_driver);