drm/i915: Use HAS_L3_GPU_CACHE in i915_gem_l3_remap

Yet another remnant ... this might explain why l3 remapping didn't
really work on HSW.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=57441
Spotted-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_gem.c

@@ -3872,7 +3872,7 @@ void i915_gem_l3_remap(struct drm_device *dev)
 	u32 misccpctl;
 	int i;
 
-	if (!IS_IVYBRIDGE(dev))
+	if (!HAS_L3_GPU_CACHE(dev))
 		return;
 
 	if (!dev_priv->l3_parity.remap_info)