ehea: using wait queues instead of msleep on ehea_flush_sq

This patch just remove a msleep loop and change to wait queue,
making the code cleaner.

Signed-off-by: Breno Leitao <leitao@linux.vnet.ibm.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ehea/ehea.h b/drivers/net/ehea/ehea.h
index 1846623..5bae7da 100644
--- a/drivers/net/ehea/ehea.h
+++ b/drivers/net/ehea/ehea.h
@@ -491,6 +491,7 @@
 	u8 full_duplex;
 	u8 autoneg;
 	u8 num_def_qps;
+	wait_queue_head_t swqe_avail_wq;
 };
 
 struct port_res_cfg {