i915: Add chipset id for Intel Integrated Graphics Device

This adds new chipset id in drm.

Signed-off-by: Zhenyu Wang <zhenyu.z.wang@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --cc drivers/char/drm/drm_pciids.h
Simple merge

diff --cc drivers/char/drm/i915_drv.c
Simple merge

diff --cc drivers/char/drm/i915_drv.h
Simple merge