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: <!5608> (cherry picked from commit 044b2385)