qcacld-3.0: Move COAP related INCS into feature flag

Currently implemented change for COAP causes to append
header files to INCS even if CONFIG_WLAN_FEATURE_COAP
is disabled. This leads to compilation hard stop due to
overflow of argumnets to shell.

ie, by moving COAP related code under feature flag can
help to reduce shell arguments when COAP is disabled.

Change-Id: If1f8334229a601f7415cbad876a7c9e0fcfb1370
CRs-Fixed: 3299853

Kbuild

@@ -2629,6 +2629,7 @@ endif
 $(call add-wlan-objs,coex,$(COEX_OBJS))
 
 ###### COAP ########
+ifeq ($(CONFIG_WLAN_FEATURE_COAP), y)
 COAP_HDD_SRC := core/hdd/src
 COAP_OS_IF_SRC := os_if/coap/src
 COAP_TGT_SRC := components/target_if/coap/src
@@ -2642,7 +2643,6 @@ COAP_DISPATCHER_INC := -I$(WLAN_ROOT)/components/coap/dispatcher/inc
 COAP_CORE_INC := -I$(WLAN_ROOT)/components/coap/core/inc
 COAP_WMI_INC := -I$(WLAN_ROOT)/components/wmi/inc
 
-ifeq ($(CONFIG_WLAN_FEATURE_COAP), y)
 COAP_OBJS := \
 	$(COAP_HDD_SRC)/wlan_hdd_coap.o \
 	$(COAP_OS_IF_SRC)/wlan_cfg80211_coap.o \
@@ -2651,9 +2651,8 @@ COAP_OBJS := \
 	$(COAP_DISPATCHER_SRC)/wlan_coap_tgt_api.o \
 	$(COAP_DISPATCHER_SRC)/wlan_coap_ucfg_api.o \
 	$(COAP_WMI_SRC)/wmi_unified_coap_tlv.o
-endif
-
 $(call add-wlan-objs,coap,$(COAP_OBJS))
+endif
 
 ############## HTC ##########
 HTC_DIR := htc