freedreno/decode: move dependencies up a level

This is mainly for the benefit of automated syncing of changes from mesa
back to envytools, where the same subdir meson.build's are used, but the
toplevel meson.build is different.  In the envytools case, we want these
depenendencies to be required.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6154>
2 files changed