r600/sb: update last_cf for finalize if.
As Glenn did for finalize_loop we need to update_cf when we add a POP at the end of a shader. I think this fixes one of the earlier shader going off end of memory problems we've stopped. Reviewed-by:Glenn Kennard <glenn.kennard@gmail.com> Cc: "10.6" "11.0" <mesa-stable@lists.freedesktop.org> Signed-off-by:
Dave Airlie <airlied@redhat.com>