Increase max buffer size to support more than 64K.
Signed-off-by: Giri Mudusuru <girim@apple.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Zhichao Gao <zhichao.gao@intel.com>
Cc: Andrew Fish <afish@apple.com>
Reviewed-by: Zhichao Gao <zhichao.gao@intel.com>