[][Help to reset Intel 2.5G Phy]

[Description]
Fix Panther/Cheetah GPIO reset Intel 2.5G EPHY's signal waveform did not
meet spec, spec request at least 500us.

[Release-Log]
N/A

Change-Id: Icb95e4c9e34ef796793390439e57617e6e3751ba
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5933834
diff --git a/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7986a-2500wan-spim-nor-rfb.dts b/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7986a-2500wan-spim-nor-rfb.dts
index c1f22d1..0e12e67 100644
--- a/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7986a-2500wan-spim-nor-rfb.dts
+++ b/target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7986a-2500wan-spim-nor-rfb.dts
@@ -102,6 +102,7 @@
 			compatible = "ethernet-phy-id67c9.de0a";
 			reg = <5>;
 			reset-gpios = <&pio 6 1>;
+			reset-assert-us = <600>;
 			reset-deassert-us = <20000>;
 			phy-mode = "2500base-x";
 		};