ARM: dts: dm814x: add fck under timers1/2

Add the functional clock definition for timers1/2. This is needed so that
the clock rate claculations continue to function properly once dm814x
transitions away from hwmod data and towards the clkctrl clocks.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dm814x.dtsi

@@ -249,6 +249,8 @@ timer1: timer@2e000 {
 				interrupts = <67>;
 				ti,hwmods = "timer1";
 				ti,timer-alwon;
+				clocks = <&timer1_fck>;
+				clock-names = "fck";
 			};
 
 			uart1: uart@20000 {
@@ -286,6 +288,8 @@ timer2: timer@40000 {
 				reg = <0x40000 0x2000>;
 				interrupts = <68>;
 				ti,hwmods = "timer2";
+				clocks = <&timer2_fck>;
+				clock-names = "fck";
 			};
 
 			timer3: timer@42000 {