iris: Wa_14016820455 for GFX_VERx10 == 12.5
Reprogram SF CLIP viewport pointer by not skipping its dirty flag bit.
Many thanks to Lin, Shuicheng shuicheng.lin@intel.com, Jerez Plata, Francisco francisco.jerez.plata@intel.com, Graunke, Kenneth W kenneth.w.graunke@intel.com, and others for their great help.
Signed-off-by: Zhang, Jianxun jianxun.zhang@intel.com Reviewed-by: Francisco Jerez currojerez@riseup.net