llvmpipe: fix rendering to 3D textures

Treat cube faces and 3D texture slices in the same manner (they're layed
out out continuously in memory).  Additional clean-ups and improvements
coming.

src/gallium/drivers/llvmpipe/lp_setup.c

@@ -531,8 +531,8 @@ lp_setup_set_fragment_sampler_views(struct lp_setup_context *setup,
                   (ubyte *) lp_tex->data + lp_tex->level_offset[j];
 #else
                jit_tex->data[j] =
-                  llvmpipe_get_texture_image(lp_tex, 0, j, LP_TEX_USAGE_READ,
-                                             LP_TEX_LAYOUT_LINEAR);
+                  llvmpipe_get_texture_image_all(lp_tex, j, LP_TEX_USAGE_READ,
+                                                 LP_TEX_LAYOUT_LINEAR);
 #endif
                jit_tex->row_stride[j] = lp_tex->stride[j];
             }