i965: Move surface resolves back to draw/dispatch time

i965: Move surface resolves back to draw/dispatch time

This is effectively a revert of 388f02729bbf88ba104f4f8ee1fdf005a240969c
though much code has been added since.  Kristian initially moved it to
try and avoid locking problems with meta-based resolves.  Now that meta
is gone from the resolve path (for good this time, we hope), we can move
it back.  The problem with having it in intel_update_state was that the
UpdateState hook gets called by core mesa directly and all sorts of
things will cause a UpdateState to get called which may trigger resolves
at inopportune times.  In particular, it gets called by _mesa_Clear and,
if we have a HiZ buffer in the INVALID_AUX state, causes a HiZ resolve
right before the clear which is pointless.  By moving it back to
try_draw_prims time, we know it will only get called right before a draw
which is where we want it.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>