platform/x86: thinkpad_acpi: Make tpacpi_driver_event() return if it handled the...

platform/x86: thinkpad_acpi: Make tpacpi_driver_event() return if it handled the event

tpacpi_driver_event() already only responds to hkey events which it knows
about. Make it return a bool and return true when it has handled the event.

This avoids the need to list TP_HKEY_EV_foo values to which it responds
both in its caller and in the function itself.

Instead callers can now call it unconditionally and check the return value.

Tested-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20240424122834.19801-8-hdegoede@redhat.com