layerscape: add compatible for board ls1043ardb

Backport a dts patch which added compatible for ls1043ardb.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>

target/linux/layerscape/patches-5.4/302-v5.7-dts-0119-arm64-dts-ls1043a-rdb-add-compatible-for-board.patch

@@ -0,0 +1,28 @@
+From fa578d4e9fbef8928a45edd904dafb1e3334417e Mon Sep 17 00:00:00 2001
+From: Yangbo Lu <yangbo.lu@nxp.com>
+Date: Thu, 30 Apr 2020 10:56:46 +0800
+Subject: [PATCH] arm64: dts: ls1043a-rdb: add compatible for board
+
+Add compatible for board to identify.
+
+Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
+Signed-off-by: Shawn Guo <shawnguo@kernel.org>
+---
+ arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts
+index dde50c8..9a93e9a 100644
+--- a/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts
++++ b/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts
+@@ -13,6 +13,7 @@
+ 
+ / {
+ 	model = "LS1043A RDB Board";
++	compatible = "fsl,ls1043a-rdb", "fsl,ls1043a";
+ 
+ 	aliases {
+ 		serial0 = &duart0;
+-- 
+2.7.4
+