[Bugfix][API-943][wifi]fix lynq_get_interface_mac retrun more character '\n'

Change-Id: Ic7151fc42abe8d2761f94ee2cc98a00fa49132bf
diff --git a/src/lynq/lib/liblynq-wifi6/libwifi6.c b/src/lynq/lib/liblynq-wifi6/libwifi6.c
index b0dc78b..f6f1dc5 100755
--- a/src/lynq/lib/liblynq-wifi6/libwifi6.c
+++ b/src/lynq/lib/liblynq-wifi6/libwifi6.c
@@ -4050,6 +4050,7 @@
     RLOGD("enter lynq_get_interface_mac\n");
     int count;
     size_t i;
+    int WIFI_INTERFACE_MAC_LEN = 17;
     char *split_words[128] = {0};
     const char *lynq_get_mac_cmd = "DRIVER MACADDR";
 
@@ -4078,7 +4079,7 @@
         }
     }
 
-    strcpy(mac, split_words[1] + i);
+    strncpy(mac, split_words[1] + i, WIFI_INTERFACE_MAC_LEN);
 
     return 0;
 }