More recent kernel commits to UAPI header break library compilation.

[pkoutoupis]

commits 7061f28d8a2faf8131ac3a8ceb1af9850313e22c and 0c43ab371bcb07d9ed9c95ea116e6d1d703b56ca of the Linux kernel break the compilation of this library. The file affected is: include/uapi/rdma/rdma_user_rxe.h.