etnaviv: simplify linear stride implementation

As documented in the galcore kernel driver "only LOD0 is valid
for this register". This makes sense, as NTE's LINEAR_STRIDE is
only capable to store one linear stride value per sampler.
This fixes linear textures in sampler slot != 0.

Fixes: 34458c1cf6c ("etnaviv: add linear sampling support")
CC: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Michael Tretter <m.tretter@pengutronix.de>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3285>
1 file changed