gma500: Fix build without ACPI

Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/gma500/opregion.h b/drivers/gpu/drm/gma500/opregion.h
index a392ea8..72dc6b9 100644
--- a/drivers/gpu/drm/gma500/opregion.h
+++ b/drivers/gpu/drm/gma500/opregion.h
@@ -22,8 +22,28 @@
  *
  */
 
+#if defined(CONFIG_ACPI)
 extern void psb_intel_opregion_asle_intr(struct drm_device *dev);
-extern void psb_intel_opregion_enable_asle(struct drm_device *dev);
 extern void psb_intel_opregion_init(struct drm_device *dev);
 extern void psb_intel_opregion_fini(struct drm_device *dev);
 extern int psb_intel_opregion_setup(struct drm_device *dev);
+
+#else
+
+extern inline void psb_intel_opregion_asle_intr(struct drm_device *dev)
+{
+}
+
+extern inline void psb_intel_opregion_init(struct drm_device *dev)
+{
+}
+
+extern inline void psb_intel_opregion_fini(struct drm_device *dev)
+{
+}
+
+extern inline int psb_intel_opregion_setup(struct drm_device *dev)
+{
+	return 0;
+}
+#endif