svcrdma: Clean up RDMA_ERROR path

Now that svc_rdma_sendto has been renovated, svc_rdma_send_error can
be refactored to reduce code duplication and remove C structure-
based XDR encoding. It is also relocated to the source file that
contains its only caller.

This is a refactoring change only.

Signed-off-by: Chuck Lever <[email protected]>
Reviewed-by: Sagi Grimberg <[email protected]>
Signed-off-by: J. Bruce Fields <[email protected]>
5 files changed