drm/nouveau/hwmon: Add config for all sensors and their settings

This is a preparation for the next patches. It just adds the sensors with
their possible configurable settings and then fills the struct hwmon_channel_info
with all this information.

Signed-off-by: Oscar Salvador <osalvador.vilardaga@gmail.com>
Reviewed-by: Martin Peres <martin.peres@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>