iris: Fix memzone_for_address for the surface and binder zones

iris: Fix memzone_for_address for the surface and binder zones

We use > for IRIS_MEMZONE_DYNAMIC because IRIS_BORDER_COLOR_POOL_ADDRESS
lives at the very start of that zone.  However, IRIS_MEMZONE_SURFACE and
IRIS_MEMZONE_BINDER are normal zones.  They used to be a single zone
(surface) with a single binder BO at the beginning, similar to the
border color pool.  But when I moved us to multiple binders, I made them
have a real zone (if a small one).  So both zones should use >=.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>