drm/i915: Update the restrict check to filter out wrong Ring ID passed by user-space

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --cc drivers/gpu/drm/i915/i915_gem_execbuffer.c
Simple merge

diff --cc drivers/gpu/drm/i915/intel_ringbuffer.h
Simple merge