hwmon: (lm90) Fix sysfs and udev notifications

hwmon: (lm90) Fix sysfs and udev notifications

BugLink: https://bugs.launchpad.net/bugs/1959879
[ Upstream commit d379880d9adb9f1ada3f1266aa49ea2561328e08 ]

sysfs and udev notifications need to be sent to the _alarm
attributes, not to the value attributes.

Fixes: 94dbd23ed88c ("hwmon: (lm90) Use hwmon_notify_event()")
Cc: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>