stable backport request

[Daniel Vetter]

Dear stable team

Please backport the following patch to all stable kernels:

4283908ef7f11a72c3b80dd4cf026f1a86429f82 drm/i915: Implement
WaDisableHiZPlanesWhenMSAAEnabled
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=50545
Tested-by: Wen-chien Jesse Sung <jesse at cola.voip.idv.tw>

Thanks, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch