Cell: deprecate some use of struct cell_command - it should go away completely

Also, remove ALIGN16_ATTRIB from structs that no longer need it.

src/mesa/pipe/cell/common.h

    int width, height;
    void *color_start, *depth_start;
    enum pipe_format color_format, depth_format;
-} ALIGN16_ATTRIB;
+};
 
 
 /**
    uint opcode;
    uint surface; /**< Temporary: 0=color, 1=Z */
    uint value;
-} ALIGN16_ATTRIB;
+};
 
 
 /**
    uint dummy3;
    uint min_index;
    boolean inline_verts;
-} ALIGN16_ATTRIB;
+};
 
 
 struct cell_command_release_verts
 
 
 /** XXX unions don't seem to work */
+/* XXX this should go away; all commands should be placed in batch buffers */
 struct cell_command
 {
+#if 0
    struct cell_command_framebuffer fb;
    struct cell_command_clear_surface clear;
    struct cell_command_render render;
+#endif
    struct cell_command_vs vs;
 } ALIGN16_ATTRIB;