qcacld-3.0: Kbuild: Refactor ol_txrx_event.o rule

There are currently two different places where ol_txrx_event.o is
added to the final target object list. As part of ongoing Makefile
cleanup consolidate these to a single location.

Change-Id: Id342ae771830f5fd4d65c6c5523c36f1e50bc941
CRs-Fixed: 2867841

Kbuild

@@ -1672,8 +1672,13 @@ FWLOG_OBJS := $(FWLOG_DIR)/dbglog_host.o
 TXRX_DIR :=     core/dp/txrx
 TXRX_INC :=     -I$(WLAN_ROOT)/$(TXRX_DIR)
 
+TXRX_OBJS :=
+ifeq ($(CONFIG_WDI_EVENT_ENABLE), y)
+TXRX_OBJS += 	$(TXRX_DIR)/ol_txrx_event.o
+endif
+
 ifneq ($(CONFIG_LITHIUM), y)
-TXRX_OBJS := $(TXRX_DIR)/ol_txrx.o \
+TXRX_OBJS += $(TXRX_DIR)/ol_txrx.o \
 		$(TXRX_DIR)/ol_cfg.o \
                 $(TXRX_DIR)/ol_rx.o \
                 $(TXRX_DIR)/ol_rx_fwd.o \
@@ -1688,10 +1693,6 @@ TXRX_OBJS := $(TXRX_DIR)/ol_txrx.o \
                 $(TXRX_DIR)/ol_txrx_encap.o \
                 $(TXRX_DIR)/ol_tx_send.o
 
-ifeq ($(CONFIG_WDI_EVENT_ENABLE), y)
-TXRX_OBJS +=	$(TXRX_DIR)/ol_txrx_event.o
-endif
-
 ifeq ($(CONFIG_LL_DP_SUPPORT), y)
 
 TXRX_OBJS +=     $(TXRX_DIR)/ol_tx_ll.o
@@ -2505,9 +2506,6 @@ endif
 
 ifeq ($(CONFIG_LITHIUM), y)
 OBJS += 	$(HAL_OBJS)
-ifeq ($(CONFIG_WDI_EVENT_ENABLE), y)
-OBJS += 	$(TXRX_DIR)/ol_txrx_event.o
-endif
 endif
 
 ifeq ($(CONFIG_FEATURE_FW_LOG_PARSING), y)