IB/hfi1: Make opfn.h self sufficient

The opfn.h include file build-ablility depends on the including file
having the correct includes.

Fix by making opfn.h self sufficient.
Reviewed-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/hfi1/opfn.h

@@ -47,12 +47,14 @@
  * for future transactions
  */
 
+#include <linux/workqueue.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/rdmavt_qp.h>
+
 /* STL Verbs Extended */
 #define IB_BTHE_E_SHIFT           24
 #define HFI1_VERBS_E_ATOMIC_VADDR U64_MAX
 
-struct ib_atomic_eth;
-
 enum hfi1_opfn_codes {
 	STL_VERBS_EXTD_NONE = 0,
 	STL_VERBS_EXTD_TID_RDMA,