vty: fix missing / wrong documentation for some commands
vty: fix missing / wrong documentation for some commands

Change-Id: Ie2f9e401c0f8f55307d98fa5afe5eb4182add43a
Related: SYS#4937, OS#3036

osmocom/osmo-bts,osmocom/osmo-bts,osmocom/osmo-bts