ARM: dts: meson: add the clock inputs for the Meson timer

The Meson Timer IP block has two clock inputs:
- clk81 for using the system clock as timebase
- xtal for a timebase with 1us, 10us, 100us and 1ms resolution

The clocksource driver does not use these yet, but it's still a good
idea to add them as this describes how the hardware actually works
internally.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
diff --git a/arch/arm/boot/dts/meson.dtsi b/arch/arm/boot/dts/meson.dtsi
index f025545..0839da0 100644
--- a/arch/arm/boot/dts/meson.dtsi
+++ b/arch/arm/boot/dts/meson.dtsi
@@ -197,7 +197,7 @@
 				interrupts = <GIC_SPI 0 IRQ_TYPE_EDGE_RISING>;
 			};
 
-			timer@9940 {
+			timer_abcde: timer@9940 {
 				compatible = "amlogic,meson6-timer";
 				reg = <0x9940 0x18>;
 				interrupts = <GIC_SPI 10 IRQ_TYPE_EDGE_RISING>,