i965: Make Gen6+ renderbuffer surface updates not depend on NEW_COLOR.

NEW_COLOR is only needed on Gen4-5 as brw_update_renderbuffer_surfaces
only uses ctx->Color when intel->gen < 6.

This should reduce unnecessary state updates.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
3 files changed