[Bugfix][wifi][API-669]fix api ret 0 with error input remade

Change-Id: I2266f23b40707a4515ad3083d2b368923867ba9d
diff --git a/lib/liblynq-wifi6/libwifi6.c b/lib/liblynq-wifi6/libwifi6.c
index 369c6b6..cf8bf72 100755
--- a/lib/liblynq-wifi6/libwifi6.c
+++ b/lib/liblynq-wifi6/libwifi6.c
@@ -836,7 +836,7 @@
     int i;
     int arr_len = sizeof(legitimate_frequency) / sizeof(int);
 
-    for(i = 0; i <= arr_len; i++)
+    for(i = 0; i < arr_len; i++)
     {
         if(input_frequency == legitimate_frequency[i])
             break;