release/DVD_PACKAGES: Update the names of drm-kmod ports

When MFC, graphics/drm-515-kmod is not merged as it only suports 14+.

Reviewed by: x11 (manu), re (gjb)
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D40770

(cherry picked from commit fea4a44c1965d4b709362a74abb0ab4b28ec29ac)