iwlwifi: mvm: add compile-time option to disable EBS

For testing purposes, we may want to disable EBS scans at compile time.
Signed-off-by: Roee Zamir <roee.zamir@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/constants.h

@@ -140,5 +140,6 @@
 #define IWL_MVM_RS_TPC_SR_FORCE_INCREASE	75	/* percent */
 #define IWL_MVM_RS_TPC_SR_NO_INCREASE		85	/* percent */
 #define IWL_MVM_RS_TPC_TX_POWER_STEP		3
+#define IWL_MVM_ENABLE_EBS			1
 
 #endif /* __MVM_CONSTANTS_H */

drivers/net/wireless/intel/iwlwifi/mvm/scan.c

@@ -743,7 +743,7 @@ static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
 	 *	4. it's not a p2p find operation.
 	 */
 	return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
-		mvm->last_ebs_successful &&
+		mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS &&
 		vif->type != NL80211_IFTYPE_P2P_DEVICE);
 }