qcacmn: Add INI support to disable spectral feature

Add INI support to disable spectral feature and do not process the spectral
user commands if spectral feature is  disabled.

Change-Id: Id353131675454652d59fd5d5f8fd3d732a07b777
Acked-by: Shashikala Prabhu <pshashik@codeaurora.org>
CRs-Fixed: 2343947

spectral/Kbuild

@@ -30,6 +30,8 @@ INCS += -I$(obj)/$(DEPTH)/cmn_dev/spectral/core
 INCS += -I$(obj)/$(DEPTH)/component_dev/direct_attach/spectral/core
 INCS += -I$(obj)/$(DEPTH)/cmn_dev/target_if/direct_buf_rx/inc
 INCS += -I$(obj)/$(DEPTH)/cmn_dev/wbuff/inc
+INCS += -I$(obj)/$(DEPTH)/cmn_dev/cfg/inc
+INCS += -I$(obj)/$(DEPTH)/ini_cfg/inc/
 
 ifeq ($(WLAN_CONV_CRYPTO_SUPPORTED), 1)
 INCS += -I$(obj)/$(DEPTH)/cmn_dev/umac/cmn_services/crypto/inc