qcacld-3.0: Add WLAN_POLICY_MGR_ENABLE in build file

Add WLAN_POLICY_MGR_ENABLE in build file to conditionally enable
Policy Manager code in host common

Change-Id: I879b6a223bed5d77d20a878667308aeb1071e609
CRs-Fixed: 2009818

Kbuild

@@ -1423,7 +1423,8 @@ CDEFINES :=	-DANI_LITTLE_BYTE_ENDIAN \
 		-DCONFIG_160MHZ_SUPPORT \
 		-DCONFIG_MCL \
 		-DWLAN_PMO_ENABLE \
-		-DWLAN_P2P_ENABLE
+		-DWLAN_P2P_ENABLE \
+		-DWLAN_POLICY_MGR_ENABLE
 
 ifneq ($(CONFIG_HIF_USB), 1)
 CDEFINES += -DWLAN_LOGGING_SOCK_SVC_ENABLE