media-video/decklink-drivers: Deprecated eclass eutils

From pkgcheck output:

media-video/decklink-drivers
  DeprecatedEclass: version 12.4.1: uses deprecated eclass: linux-mod (migrate to linux-mod-r1.eclass)

Please migrate as indicated by pkgcheck.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information