kconfig: Have the 'FLOAT' menu depend on it being enabled

As this was written before, a 'FLAOT' menu entry was present, and to
see what kind of features or configuration it had, one had to navigate
into the menu to determine if anything related to 'FLOAT' was enabled
at all.

Now there is an unchecked box on the 'FLOAT' menu when it is disabled,
which clearly expresses that it is disabled without the need to enter
the menu entry.

This change only changes the menu layout, and not the dependencies of
any options.

Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
1 file changed