qcacld-3.0: Add runtime pm initialization

Add runtime pm initialization, including the creation
of a debugfs entry.

Change-Id: Ib057feaf36a04bb525a731e236187c134449c5f2
CRs-Fixed: 935300
diff --git a/core/hif/inc/hif.h b/core/hif/inc/hif.h
index cc7a66f..b1ff3d9 100644
--- a/core/hif/inc/hif.h
+++ b/core/hif/inc/hif.h
@@ -642,6 +642,7 @@
 	enum hif_enable_type type);
 void hif_disable(void *hif_ctx, enum hif_disable_type type);
 void hif_enable_power_gating(void *hif_ctx);
+void hif_enable_power_management(void *hif_ctx);
 int hif_bus_resume(void);
 int hif_bus_suspend(void);
 void hif_vote_link_down(void);