drm/i915: add HAS_BSD check to i915_getparam

This will let userland only try to use the new media decode
functionality when the appropriate kernel is present.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

drivers/gpu/drm/i915/i915_dma.c

@@ -744,6 +744,9 @@ static int i915_getparam(struct drm_device *dev, void *data,
 		/* depends on GEM */
 		value = dev_priv->has_gem;
 		break;
+	case I915_PARAM_HAS_BSD:
+		value = HAS_BSD(dev);
+		break;
 	default:
 		DRM_DEBUG_DRIVER("Unknown parameter %d\n",
 				 param->param);