[Mesa-dev] MR: Revert "nir/lower_indirect: Bail early if modes == 0"

[Ian Romanick]

https://gitlab.freedesktop.org/mesa/mesa/merge_requests/26

    "There's no point in walking the program if we're never going to
    actually lower anything."

Except we might lower compacted local arrays.  In that case, modes will
be 0, but there is still lowering to be done.

This reverts commit 7f75cf2a.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109081
Suggested-by: Kenneth Graunke kenneth at whitecape.org
Cc: Jason Ekstrand jason at jlekstrand.net
Cc: Kenneth Graunke kenneth at whitecape.org