r600: partly revert disabling tiling for 1d texture.

r600: partly revert disabling tiling for 1d texture.

Previously we had a check for 1d of narrow 2D textures, however
narrow 2d textures caused gpu hangs, but it was correct for 1d
textures.

This fixes a bunch of 1D image piglits for me.

Fixes: 7b8e1c089d (r600/texture: drop lowering 1d/2d images to linear.)
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>