qcacld-3.0: CL 1407588 - update fw common interface files

qcacld-2.0 to qcacld-3.0 propagation

WMI_ROAM_SYNCH_EVENT cleanup

CRs-Fixed: 932665
Change-Id: Iaf25497b2f511e03823894084b6920be79ca2dba

target/inc/wmi_version.h

@@ -36,7 +36,7 @@
 #define __WMI_VER_MINOR_    0
 /** WMI revision number has to be incremented when there is a
  *  change that may or may not break compatibility */
-#define __WMI_REVISION_ 173
+#define __WMI_REVISION_ 174
 
 /** The Version Namespace should not be normally changed. Only
  *  host and firmware of the same WMI namespace will work