Revert "gallium: remove PIPE_CAP_TEXTURE_SHADOW_MAP"

There are GPUs that do not support this feature.

This reverts commit e871abe452ad40efcccb0bab6b88fc31d0551e29

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
4 files changed