IB/hfi1, qib: Add ieth to the packet header definitions

A new union member "ieth" (Invalidate Extended Transport Header) is
added to the packet header definition in preparation of supporting
the send with invalidate opcode.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jianxin Xiong <jianxin.xiong@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/hfi1/verbs.h

@@ -152,6 +152,7 @@ union ib_ehdrs {
 	} at;
 	__be32 imm_data;
 	__be32 aeth;
+	__be32 ieth;
 	struct ib_atomic_eth atomic_eth;
 }  __packed;