arm: aspeed: Add clock-names property to timer node

The merging of a number of clocksource drivers into fttmr010 means we
require clock-names to be specified in the Aspeed timer node, else the
clocksource fails to probe and boot hangs.
Signed-off-by: NAndrew Jeffery <andrew@aj.id.au>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>

arch/arm/boot/dts/aspeed-g4.dtsi

@@ -893,6 +893,7 @@
 				//interrupts = <16 17 18 35 36 37 38 39>;
 				interrupts = <16>;
 				clocks = <&clk_apb>;
+				clock-names = "PCLK";
 			};
 
 			wdt1: wdt@1e785000 {

arch/arm/boot/dts/aspeed-g5.dtsi

@@ -1000,6 +1000,7 @@
 				//interrupts = <16 17 18 35 36 37 38 39>;
 				interrupts = <16>;
 				clocks = <&clk_apb>;
+				clock-names = "PCLK";
 			};