i965: Fold the gen7_cc_viewport_state_pointer atom into brw_cc_vp.

i965: Fold the gen7_cc_viewport_state_pointer atom into brw_cc_vp.

These always happen together; the extra atom just means another item to
iterate through, flags to check, and a call through a function pointer.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>