Comment # 1 on bug 109619 from Timothy Arceri

Fixed by:

commit 024232b26c203d593533e488b5131e7a787b2ac1
Author: Timothy Arceri <tarceri@itsqueeze.com>
Date:   Tue May 7 10:18:54 2019 +1000

    radeonsi: add an AMD_TEX_ANISO environment variable

    This brings it inline with the recently added AMD_DEBUG.

    Reviewed-by: Marek Olšák <marek.olsak@amd.com>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109619