pwm: atmel-hlcdc: add sama5d2 SoC support.

Add sama5d2 hlcdc backlight PWM support. This chip doesn't have to deal with an
errata, so it's a simple addition of the mfd compatible string.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-atmel-hlcdc.c

@@ -226,6 +226,9 @@ static const struct of_device_id atmel_hlcdc_dt_ids[] = {
 		.compatible = "atmel,at91sam9x5-hlcdc",
 		.data = &atmel_hlcdc_pwm_at91sam9x5_errata,
 	},
+	{
+		.compatible = "atmel,sama5d2-hlcdc",
+	},
 	{
 		.compatible = "atmel,sama5d3-hlcdc",
 		.data = &atmel_hlcdc_pwm_sama5d3_errata,