[][Kernel][mt7988][eth][Add Ethernet API to adjust PSE OQ drop]

[Description]
Add Ethernet API to dynamically adjust PSE output port
drop configurations. It's exported for WiFi driver to
fine-tune hw path drop policy according to scenario.

[Release-log]
N/A


Change-Id: I2c63951d80d22b04346c9f3948bb8bb0033de1b6
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6794384
diff --git a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.h
index 1a11af6..00eec80 100755
--- a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -1601,6 +1601,7 @@
 };
 
 /* the struct describing the SoC. these are declared in the soc_xyz.c files */
+extern struct mtk_eth *g_eth;
 extern const struct of_device_id of_mtk_match[];
 extern u32 mtk_hwlro_stats_ebl;