SUNRPC: Update trace flags

Recent patches added RPC_TASK_MOVEABLE, XPRT_OFFLINE, and
XPRT_REMOVE. Update the tracepoint display macros to display these
flags properly.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>