qcacmn: Fix clang compilation warnings

Fix clang compilation warnings.

Change-Id: If7d2d148f4d478d151640ee1a85ca64a9096cdd2
CRs-Fixed: 2055513

wmi_unified_priv.h

@@ -49,8 +49,6 @@
 #define WMI_UNIFIED_MAX_EVENT 0x100
 #define WMI_MAX_CMDS 1024
 
-typedef qdf_nbuf_t wmi_buf_t;
-
 #ifdef WMI_INTERFACE_EVENT_LOGGING
 
 #define WMI_EVENT_DEBUG_MAX_ENTRY (1024)