HID: hid-steam: Disable watchdog instead of using a heartbeat

[ Upstream commit 91797263 ]

The Steam Deck has a setting that controls whether or not the watchdog is
enabled, so instead of using a heartbeat to keep the watchdog from triggering,
this commit changes the behavior to simply disable the watchdog instead.

Signed-off-by: Jiri Kosina <jkosina@suse.com>
Stable-dep-of: 79504249 ("HID: hid-steam: Move hidraw input (un)registering to work")
Signed-off-by: Sasha Levin <sashal@kernel.org>