qcacld-3.0: Prepare HDD for unified logging

Currently the HDD code uses a variety of logging APIs. In qcacld-3.0
HDD should converge on a unified set of logging APIs. Due to the large
number of changes required, this will have to be done in a phased
approach, with conversions occurring one source file at a time.

One potential problem that could occur, in the absence of any
protection, is that once a particular source file has been converted
to the unified set of logging APIs, someone could introduce new code,
either as a new feature or as a change propagation from qcacld-2.0,
which re-introduces invocations of legacy logging APIs.  In order to
help prevent this, add conditional compilation to the hddLog() API so
that it will not be available to source files which have been
converted to the unified set of logging APIs.  This will cause a
compilation error if hddLog() is called from source files which have
been converted.

Once all of the source files have been converted, the hddLog() macro
itself can be removed from the source code.

Change-Id: I5debb0eb9cd89c08fdfcc4fc117776160ed34501
CRs-Fixed: 949529

core/hdd/inc/wlan_hdd_main.h

@@ -156,8 +156,9 @@
 
 #define WLAN_CHIP_VERSION   "WCNSS"
 
+#ifndef HDD_DISALLOW_LEGACY_HDDLOG
 #define hddLog(level, args ...) CDF_TRACE(CDF_MODULE_ID_HDD, level, ## args)
-
+#endif
 #define hdd_log(level, args...) CDF_TRACE(CDF_MODULE_ID_HDD, level, ## args)
 #define hdd_logfl(level, format, args...) hdd_log(level, FL(format), ## args)