staging: wlags49_h2: remove return statements at the end of all void functions

this patch removes the return statement at the end of all void functions,
since the function returning void no need to have a return at the end of the
function.

Signed-off-by: Devendra Naga <develkernel412222@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>