maintainer-feedback requested: [Bug 256354] x11-drivers/xf86-video-intel: work around execbuffer2 test failure

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Bugzilla Automation <bugzilla at FreeBSD.org> has asked freebsd-x11 (Nobody)
<x11 at FreeBSD.org> for maintainer-feedback:
Bug 256354: x11-drivers/xf86-video-intel: work around execbuffer2 test failure
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256354



--- Description ---
For long time, I was not able to enable DRI3 with SNA.	It turned out
DRM_IOCTL_I915_GEM_EXECBUFFER2 ioctl returns a different error code, i.e.,
ENOENT instead of EFAULT.  The attached patch fixed the following error for me.

(WW) intel(0): Detected unsupported/dysfunctional hardware, disabling
acceleration.