platform/x86: ideapad-laptop: introduce a generic notification chain

[ Upstream commit 613e3900 ]

There are several cases where a notification chain can simplify Lenovo
WMI drivers.

Add a generic notification chain into ideapad-laptop.

Signed-off-by: Gergo Koteles <soyer@irl.hu>
Link: https://lore.kernel.org/r/c5a43efae8a32bd034c3d19c0a686941347575a7.1721898747.git.soyer@irl.hu


Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Stable-dep-of: 5808c342 ("platform/x86: ideapad-laptop: use usleep_range() for EC polling")
Signed-off-by: Sasha Levin <sashal@kernel.org>