[][MT79xx add USBIF compliance toolkit]

[Description]
Add USBIF compliance toolkit for MT79xx
usb3hqa
RG_USB20_INTR_EN
RG_UsB20_VRT_VREF_SEL
RG_USB20_TERM_VREF_SEL
RG_USB20_HSTX_SRCTRL
RG_USB20_DISCTH
RG_CHGDT_EN

[Release-log]
N/A

Change-Id: I2f7e4bdf27c2197a198ce10af3a09c362adfc04a
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5351515
14 files changed