[][Update PSE Drop Configuration for P8/P9]

[Description]
Change PSE drop configuration to prevent packets
from WDMA0/WDMA1 being dropped. (DE suggested)
If without this setting, it might lead to WED hang
in some corner cases.

[Release-log]
N/A

Change-Id: Iec5b6842c6ec0e7b8621f56733bfd284fcba5183
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4757465
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 8f152ab..49e605a 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
@@ -111,6 +111,7 @@
 /* PSE Free Queue Flow Control  */
 #define PSE_FQFC_CFG1		0x100
 #define PSE_FQFC_CFG2		0x104
+#define PSE_DROP_CFG		0x108
 
 /* PSE Input Queue Reservation Register*/
 #define PSE_IQ_REV(x)		(0x140 + ((x - 1) * 0x4))