mesa/st: set min/max texture gather offset to driver-reported value

It was always getting set to -8/7 unconditionally.  Use the
driver-reported value instead.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
1 file changed