ARM: dts: ls1021a: add 1588 timer node

Add the 1588 timer node for ls1021a platform to
support gianfar ptp driver.
Signed-off-by: NYangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/arm/boot/dts/ls1021a.dtsi

@@ -457,6 +457,18 @@
 			reg = <0x0 0x2d24000 0x0 0x4000>;
 		};
 
+		ptp_clock@2d10e00 {
+			compatible = "fsl,etsec-ptp";
+			reg = <0x0 0x2d10e00 0x0 0xb0>;
+			interrupts = <GIC_SPI 173 IRQ_TYPE_LEVEL_HIGH>;
+			fsl,tclk-period = <5>;
+			fsl,tmr-prsc    = <2>;
+			fsl,tmr-add     = <0xaaaaaaab>;
+			fsl,tmr-fiper1  = <999999990>;
+			fsl,tmr-fiper2  = <99990>;
+			fsl,max-adj     = <499999999>;
+		};
+
 		enet0: ethernet@2d10000 {
 			compatible = "fsl,etsec2";
 			device_type = "network";