coreboot/dell7 is now part of coreboot/next, which in turn
has been updated, to accomodate 3050 micro patchset 18:
https://review.coreboot.org/c/coreboot/+/82053/18
It incorporates my Verb/VBT patches, which are therefore
no longer included separately.
Mate has fixed the USB config; see diff for details.
The configuration of USB ports was wrong, before.
Signed-off-by: Leah Rowe <leah@libreboot.org>