net: qualcomm: rmnet: Remove redundant check when stamping map header

We already check the headroom once in rmnet_map_egress_handler(),
so this is not needed.
Signed-off-by: NSubash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c

@@ -32,9 +32,6 @@ struct rmnet_map_header *rmnet_map_add_map_header(struct sk_buff *skb,
 	u32 padding, map_datalen;
 	u8 *padbytes;
 
-	if (skb_headroom(skb) < sizeof(struct rmnet_map_header))
-		return NULL;
-
 	map_datalen = skb->len - hdrlen;
 	map_header = (struct rmnet_map_header *)
 			skb_push(skb, sizeof(struct rmnet_map_header));