[][kernel][mt7988][eth][mediatek-ge: Fix LED polarity]

[Description]
Fix LED polarity according to boottrap's polarity. With
this fix, LED can blink correctly when Gphy is linked up.

[Release-log]
N/A

Change-Id: Ic170454961921161e824f254e62a6875db586369
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6668058
Build: srv_hbgsm110
diff --git a/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7988.dtsi b/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7988.dtsi
index a4d3f2f..604f5aa 100644
--- a/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7988.dtsi
+++ b/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7988.dtsi
@@ -397,6 +397,11 @@
 		      <0 0x0f0f0000 0 0x200>;
 	};
 
+	boottrap: boottrap@1001f6f0 {
+		compatible = "mediatek,boottrap";
+		reg = <0 0x1001f6f0 0 0x20>;
+	};
+
 	gic: interrupt-controller@c000000 {
 		compatible = "arm,gic-v3";
 		#interrupt-cells = <3>;