platform: mellanox: mlx-platform: Modify health and power hotplug action

Set explicitly hotplug event action for health and power signals for
L1 switch as "MLXREG_HOTPLUG_DEVICE_NO_ACTION" in order to allow
processing of notification callback even I2C parent bus is not
specified.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Michael Shych <michaelsh@nvidia.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230822113451.13785-5-vadimp@nvidia.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>