platform/x86: wmi: Merge get_event_data() with wmi_get_notify_data()

Since get_event_data() is only called by wmi_get_notify_data(), it
makes sense to merge both functions.

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20240901031055.3030-5-W_Armin@gmx.de


Signed-off-by: Hans de Goede <hdegoede@redhat.com>