Fix permissions on the DRM_I915_HWS_ADDR ioctl, should be master only.
Fix permissions on the DRM_I915_HWS_ADDR ioctl, should be master only.

Pointed out by Olaf Kirch, this has been in snaps for two weeks, no
problems.

ok millert@, deraadt@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars