drm/i915: add a new BSD ring buffer for Sandybridge

This ring buffer is used for video decoding/encoding on Sandybridge.

Signed-off-by: Xiang, Haihao <haihao.xiang@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 393696c..2c87f9b 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -157,11 +157,13 @@
 static const struct intel_device_info intel_sandybridge_d_info = {
 	.gen = 6,
 	.need_gfx_hws = 1, .has_hotplug = 1,
+	.has_bsd_ring = 1,
 };
 
 static const struct intel_device_info intel_sandybridge_m_info = {
 	.gen = 6, .is_mobile = 1,
 	.need_gfx_hws = 1, .has_hotplug = 1,
+	.has_bsd_ring = 1,
 };
 
 static const struct pci_device_id pciidlist[] = {		/* aka */