Staring from HSW, the resolution limit of FBC has increased to
4096*4096

Issue: VIZ-2813
Change-Id: I842f64e3cf2c0d18d29ef1bcfef3b9bb1f1764ac
Signed-off-by: NDaisy Sun <daisy.sun@intel.com>
Reviewed-by: NDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>