thinkpad-acpi: SW_RADIO to SW_RFKILL_ALL rename

Rename SW_RADIO to SW_RFKILL_ALL in thinkpad-acpi code and docs, following
5adad013

 "Input: rename SW_RADIO to
SW_RFKILL_ALL".

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>