[][[Panther][AX8400][MT7986A][MT7976][ePA][WiFi]The 2.5G wan interface didn't show any link up/down log when cable plug/unplug]

Add a external interrupt handler for GPY211 single phy chip.

This interrupt handler will display link up/down message and notify kernel when receiving link status change interrupt.

Note1: This patch will disable UART2 on the 2500WAN RFB, since single phy external interrupt occupied UART2_RXD and UART2_TXD.
Note2: The interrupt handler will not notify kernel on the 2500WAN GSW RFB.


Change-Id: Ibbecb437049f02a4ce479fee2cb035b7c17dac66
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6194248
7 files changed