generic: 6.6: mtk_eth_soc: reset all TX queues on DMA free
The purpose of resetting the TX queue is to reset the
byte and packet count as well as to clear the software
flow control XOFF bit.
MediaTek developers pointed out that netdev_reset_queue would only
resets queue 0 of the network device.
Queues that are not reset may cause unexpected issues.
Packets may stop being sent after reset and "transmit timeout" log may
be displayed.
Import fix from MediaTek's SDK to resolve this issue.
Link: https://git01.mediatek.com/plugins/gitiles/openwrt/feeds/mtk-openwrt-feeds/+/5746a94456f466446cc0dcdfbd9078df6df31b63
Signed-off-by: Daniel Golle <daniel@makrotopia.org>