st/mesa: inline st_prepare_vertex_program
No other shader stage has a "prepare" function. This will allow removing some variables from st_vertex_program. Also, prepare_fragment_program was a dead prototype. Reviewed-by:Dave Airlie <airlied@redhat.com> Reviewed-by:
Brian Paul <brianp@vmware.com> Tested-by:
Brian Paul <brianp@vmware.com>