kernel: kconfig: Disable DEVICE_DEINIT_SUPPORT by default

This Kconfig, which it itself admits is for a "very specific case"
was set to default as yes, this includes extra code in drivers with
this functionality and increases driver struct size for cases where
this function isn't needed (i.e. all because it's enabled by
default), therefore change it to be opt-in rather than opt-out

Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>