ARM: dts: at91: sama5d4ek: use TCB2 as timers

As TCB2 doesn't have any output pins, use it for timers.
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

arch/arm/boot/dts/at91-sama5d4ek.dts

@@ -174,6 +174,18 @@ usart4: serial@fc010000 {
 				status = "okay";
 			};
 
+			tcb2: timer@fc024000 {
+				timer@0 {
+					compatible = "atmel,tcb-timer";
+					reg = <0>;
+				};
+
+				timer@1 {
+					compatible = "atmel,tcb-timer";
+					reg = <1>;
+				};
+			};
+
 			watchdog@fc068640 {
 				status = "okay";
 			};