net: rfkill: gpio: allow booting in blocked state

By default, rfkill state is unblocked and this behavior is not
configurable. Add support for booting in blocked state based on the
presence of a devicetree property.

Signed-off-by: Catalin Popescu <catalin.popescu@leica-geosystems.com>
Link: https://patch.msgid.link/20250116084702.3473176-2-catalin.popescu@leica-geosystems.com


Signed-off-by: Johannes Berg <johannes.berg@intel.com>