rdma/cxgb4: Fix SRQ endianness annotations

This patch avoids that sparse complains about casts to restricted __be32.

Fixes: a3cdaa69e4 ("cxgb4: Adds CPL support for Shared Receive Queues")
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/cxgb4/cm.c

@@ -1853,7 +1853,8 @@ static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
 	return 0;
 }
 
-static void complete_cached_srq_buffers(struct c4iw_ep *ep, u32 srqidx_status)
+static void complete_cached_srq_buffers(struct c4iw_ep *ep,
+					__be32 srqidx_status)
 {
 	enum chip_type adapter_type;
 	u32 srqidx;