ARM: dts: cygnus: fix irq type for arm global timer

As per ARM documentation
PPI(0) ID27 - global timer interrupt is rising-edge sensitive.

set IRQ triggering type to IRQ_TYPE_EDGE_RISING for ARM Global timers.

Fixes: c9ad7bc5fe3 ("ARM: dts: Enable Broadcom Cygnus SoC")
Signed-off-by: Clément Péron <peron.clem@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/boot/dts/bcm-cygnus.dtsi

@@ -69,7 +69,7 @@
 		timer@20200 {
 			compatible = "arm,cortex-a9-global-timer";
 			reg = <0x20200 0x100>;
-			interrupts = <GIC_PPI 11 IRQ_TYPE_LEVEL_HIGH>;
+			interrupts = <GIC_PPI 11 IRQ_TYPE_EDGE_RISING>;
 			clocks = <&periph_clk>;
 		};