clk: at91: add compatible for sam9x60

Add compatible for SAM9X60's PMC.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>

Author: claudiubeznea

drivers/clk/at91/pmc.c

@@ -271,6 +271,7 @@ static struct syscore_ops pmc_syscore_ops = {
 
 static const struct of_device_id sama5d2_pmc_dt_ids[] = {
 	{ .compatible = "atmel,sama5d2-pmc" },
+	{ .compatible = "microchip,sam9x60-pmc" },
 	{ /* sentinel */ }
 };