arm64: dts: stratix10: move ARM timer out of SoC node

The ARM timer is usually considered not part of SoC node, just like
other ARM designed blocks (PMU, PSCI).  This fixes dtbs_check warning:

  arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dt.yaml: soc: timer:
    {'compatible': ['arm,armv8-timer'], 'interrupts': [[1, 13, 3848], [1, 14, 3848], [1, 11, 3848], [1, 10, 3848]]} should not be valid under {'type': 'object'}
    From schema: dtschema/schemas/simple-bus.yaml
Signed-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: NDinh Nguyen <dinguyen@kernel.org>

arch/arm64/boot/dts/altera/socfpga_stratix10.dtsi

@@ -77,6 +77,16 @@
 		method = "smc";
 	};
 
+	/* Local timer */
+	timer {
+		compatible = "arm,armv8-timer";
+		interrupts = <1 13 0xf08>,
+			     <1 14 0xf08>,
+			     <1 11 0xf08>,
+			     <1 10 0xf08>;
+		interrupt-parent = <&intc>;
+	};
+
 	intc: interrupt-controller@fffc1000 {
 		compatible = "arm,gic-400", "arm,cortex-a15-gic";
 		#interrupt-cells = <3>;
@@ -406,15 +416,6 @@
 			reg = <0xffd12000 0x228>;
 		};
 
-		/* Local timer */
-		timer {
-			compatible = "arm,armv8-timer";
-			interrupts = <1 13 0xf08>,
-				     <1 14 0xf08>,
-				     <1 11 0xf08>,
-				     <1 10 0xf08>;
-		};
-
 		timer0: timer0@ffc03000 {
 			compatible = "snps,dw-apb-timer";
 			interrupts = <0 113 4>;