IB/rxe: Do not export module's private function

Function rxe_rcv is used internally in RXE and don't need to be
exported. This patch removes such export declaration.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/sw/rxe/rxe_recv.c

@@ -419,4 +419,3 @@ drop:
 	kfree_skb(skb);
 	return 0;
 }
-EXPORT_SYMBOL(rxe_rcv);