qcacld-3.0: Add new legacy serialization file in Kbuild

There is new legacy serialization MCL file added to serialization
module which needs to be compiled for MCL platform and needed to
add reference in SME  module.

CRs-Fixed: 2005532
Change-Id: Id946a62f6e0dec4531deccc83dae6373d396a91a

Kbuild

@@ -965,6 +965,7 @@ UMAC_SER_OBJS := $(UMAC_SER_OBJ_DIR)/wlan_serialization_dequeue.o \
 		 $(UMAC_SER_OBJ_DIR)/wlan_serialization_main.o \
 		 $(UMAC_SER_OBJ_DIR)/wlan_serialization_api.o \
 		 $(UMAC_SER_OBJ_DIR)/wlan_serialization_utils.o \
+		 $(UMAC_SER_OBJ_DIR)/wlan_serialization_legacy_mcl_api.o \
 		 $(UMAC_SER_OBJ_DIR)/wlan_serialization_rules.o
 ############## HTC ##########
 HTC_DIR := htc