datapath: Remove unnecessary range check from put_actions().

datapath: Remove unnecessary range check from put_actions().

This code checked that the number of actions in a flow query did not
exceed the maximum number of actions that are allowed on a given flow.
But this check is unnecessary, since the code will never copy out any
more actions than actually exist in a flow.  It would be a shame to refuse
a flow query simply on the basis that the caller allocated more memory
than necessary, so eliminate the check.