qcacld-3.0: Provide hif runtime suspend resume apis

hif runtime suspend resume is identical to a regular bus suspend
resume, but provide a different api just in case this changes.

Change-Id: If069df7733d6a1ebe38d356ac5bdd4e2a250118b
CRs-Fixed: 935300

core/hif/inc/hif.h

@@ -684,6 +684,8 @@ void hif_runtime_pm_set_state_inprogress(void);
 void hif_runtime_pm_set_state_on(void);
 
 void hif_enable_power_management(void *hif_ctx);
+int hif_runtime_suspend(void);
+int hif_runtime_resume(void);
 int hif_bus_resume(void);
 int hif_bus_suspend(void);
 void hif_vote_link_down(void);