wlan: Driver advertize max_interface limit to 3.

Changed maximum supported interface from 2 to 3
as some vendors create a separate
interface for P2P interface after GO negotation.

CRs-Fixed: 443565,444195
Change-Id: I09d735830a16060d425fd32e3ee9162a5159bccb
diff --git a/CORE/HDD/inc/wlan_hdd_main.h b/CORE/HDD/inc/wlan_hdd_main.h
index 1cf3562..5b43336 100644
--- a/CORE/HDD/inc/wlan_hdd_main.h
+++ b/CORE/HDD/inc/wlan_hdd_main.h
@@ -167,6 +167,9 @@
 
 #define HDD_SAP_WAKE_LOCK_DURATION 10000 //10 sec
 
+/* Maximum number of interfaces allowed(STA, P2P Device, P2P Interface) */
+#define WLAN_MAX_INTERFACES 3
+
 typedef struct hdd_tx_rx_stats_s
 {
    // start_xmit stats