The /help telemetry command prints out the help text for the given
command passed in as parameter. However, entering /help without any
parameters does not give any useful information as to the fact that you
need to pass in a command to get help on. Update the command so it
prints its own help text when called without any parameters.
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Ciara Power <ciara.power@intel.com>
Acked-by: Morten Brørup <mb@smartsharesystems.com>
Acked-by: Chengwen Feng <fengchengwen@huawei.com>