drm/i915/bdw: Add BDW support in the i915 debugfs entry

The patch introduces fixes for the debugfs attributes emitted by
the i915 driver for GEN8. Currently, it is not emitting the correct
 attributes which include the status of RC6 states.

Change-Id: Ib2068a0cac9a5wq3f228e547fa1a097ad369d242df
Signed-off-by: NVedang Patel <vedang.patel@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_debugfs.c

@@ -1381,7 +1381,7 @@ static int i915_drpc_info(struct seq_file *m, void *unused)
 
 	if (IS_VALLEYVIEW(dev))
 		return vlv_drpc_info(m);
-	else if (IS_GEN6(dev) || IS_GEN7(dev))
+	else if (INTEL_INFO(dev)->gen >= 6)
 		return gen6_drpc_info(m);
 	else
 		return ironlake_drpc_info(m);