qcacmn: Remove multiple definitions of __qdf_nbuf_free api

There are multiple definitions of __qdf_nbuf_free api based
on CONFIG_MCL feature flag.
As a part of cleanup activity remove multiple definitions
of __qdf_nbuf_free api.

Change-Id: Ib7fce54353561a45a4662c05d56d3af187a269e1
CRs-Fixed: 2472016

qdf/linux/src/qdf_nbuf.c

@@ -506,7 +506,6 @@ qdf_export_symbol(__qdf_nbuf_alloc);
  * Return: none
  */
 
-#ifdef CONFIG_MCL
 void __qdf_nbuf_free(struct sk_buff *skb)
 {
 	if (pld_nbuf_pre_alloc_free(skb))
@@ -518,16 +517,6 @@ void __qdf_nbuf_free(struct sk_buff *skb)
 	else
 		dev_kfree_skb_any(skb);
 }
-#else
-void __qdf_nbuf_free(struct sk_buff *skb)
-{
-	if (pld_nbuf_pre_alloc_free(skb))
-		return;
-
-	qdf_nbuf_count_dec(skb);
-	dev_kfree_skb_any(skb);
-}
-#endif
 
 qdf_export_symbol(__qdf_nbuf_free);