xprtrdma: Display XIDs in host byte order

xprtsock.c and the backchannel code display XIDs in host byte order.
Follow suit in xprtrdma.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>