platform/x86: hp-wmi: avoid cancel_delayed_work_sync from work handler

platform/x86: hp-wmi: avoid cancel_delayed_work_sync from work handler

hp_wmi_apply_fan_settings() uses cancel_delayed_work_sync() to stop
the keep-alive timer in AUTO mode. However, since
hp_wmi_apply_fan_settings() is also called from the keep-alive
handler, a race condition with a sysfs write can cause the handler to
wait on itself, leading to a deadlock.

Replace cancel_delayed_work_sync() with cancel_delayed_work() in
hp_wmi_apply_fan_settings() to avoid the self-flush deadlock.

Fixes: c203c59fb5de ("platform/x86: hp-wmi: implement fan keep-alive")
Signed-off-by: Emre Cecanpunar <emreleno@gmail.com>
Link: https://patch.msgid.link/20260407142515.20683-3-emreleno@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>