driconf: bump the maximum string size from 25 to 1024

The soon-to-be-introduced string entries will potentially introduce
very long strings that should not be truncated.

Reviewed-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Martin peres <martin.peres@linux.intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7212>
1 file changed