qcacmn: Implement WMI/Credit History log print APIs

Create output agnostic log print APIs for WMI and Credit History to
enhance the debugging experience.

Change-Id: Ie89a9cb3b54c373ac2610d62003e940da17696d8
CRs-Fixed: 2028762

qdf/inc/qdf_trace.h

@@ -53,6 +53,8 @@
 #define QDF_DEFAULT_TRACE_LEVEL (1 << QDF_TRACE_LEVEL_INFO)
 #endif
 
+typedef int (qdf_abstract_print)(void *priv, const char *fmt, ...);
+
 /*
  * Log levels
  */