etnaviv: completely turn off MSAA

MSAA worked before etnaviv landed in upstream mesa but got
broken over time. Disable MSAA completely until it is fixed again.

Fixes problems/crashes with applications that want to make use of MSAA.

Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5608>
1 file changed