staging: vt6656: iwctl: Fix up a few remaining brace issues

My previous cleanup patches missed a few cases of
redundant/missing/replaced curly braces. This should fix up the last
ones.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Acked-by : Marcos Paulo de Souza <marcos.souza.org@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>