svga, glhd: Remove incorrect assert and add note

Stride can be lower then the size of the attribute.
But should probably be aligned to component size atleast for floats.

src/gallium/drivers/galahad/glhd_context.c

@@ -381,6 +381,8 @@ galahad_create_vertex_elements_state(struct pipe_context *_pipe,
    struct galahad_context *glhd_pipe = galahad_context(_pipe);
    struct pipe_context *pipe = glhd_pipe->pipe;
 
+   /* XXX check if stride lines up with element size, at least for floats */
+
    return pipe->create_vertex_elements_state(pipe,
                                              num_elements,
                                              vertex_elements);

src/gallium/drivers/svga/svga_draw.c

@@ -315,7 +315,6 @@ enum pipe_error svga_hwtnl_prim( struct svga_hwtnl *hwtnl,
             break;
          }
 
-         assert(!stride || width <= stride);
          if (max_index != ~0) {
             assert(offset + (index_bias + max_index) * stride + width <= size);
          }