RDMA/rxe: Extend rxe packet format to support atomic write

Extend rxe_wr_opcode_info[] and rxe_opcode[] for new atomic write opcode.

Link: https://lore.kernel.org/r/1669905432-14-5-git-send-email-yangx.jy@fujitsu.com


Signed-off-by: Xiao Yang <yangx.jy@fujitsu.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>