[][kernel][mt7988][usb]Add USB 2.0 Phy preemphasis parameter support]

[Description]
Add USB 2.0 phy preemphasis parameter support

[Release-log]
N/A

Change-Id: I0543ec4c840706bafaf0727f6409f40cff5b8056
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6378563
diff --git a/target/linux/mediatek/files-5.4/drivers/usb/host/unusual-statement.h b/target/linux/mediatek/files-5.4/drivers/usb/host/unusual-statement.h
index e898a26..80b786a 100644
--- a/target/linux/mediatek/files-5.4/drivers/usb/host/unusual-statement.h
+++ b/target/linux/mediatek/files-5.4/drivers/usb/host/unusual-statement.h
@@ -13,5 +13,6 @@
 UNUSUAL_DEVICE_ATTR(RG_USB20_HSTX_SRCTRL),
 UNUSUAL_DEVICE_ATTR(RG_USB20_DISCTH),
 UNUSUAL_DEVICE_ATTR(RG_CHGDT_EN),
+UNUSUAL_DEVICE_ATTR(RG_USB20_PHY_REV),
 UNUSUAL_DEVICE_ATTR(reg),