drm/vmwgfx: Update device includes for DX device functionality

Add DX includes and move all device includes to a separate directory.

Co-authored with Thomas Hellstrom, Charmaine Lee and above all,
the VMware device team.

Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Charmaine Lee <charmainel@vmware.com>

drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c

@@ -1981,8 +1981,6 @@ static const struct vmw_cmd_entry vmw_cmd_entries[SVGA_3D_CMD_MAX] = {
 		    false, false, true),
 	VMW_CMD_DEF(SVGA_3D_CMD_DESTROY_GB_MOB, &vmw_cmd_invalid,
 		    false, false, true),
-	VMW_CMD_DEF(SVGA_3D_CMD_REDEFINE_GB_MOB, &vmw_cmd_invalid,
-		    false, false, true),
 	VMW_CMD_DEF(SVGA_3D_CMD_UPDATE_GB_MOB_MAPPING, &vmw_cmd_invalid,
 		    false, false, true),
 	VMW_CMD_DEF(SVGA_3D_CMD_DEFINE_GB_SURFACE, &vmw_cmd_invalid,