add_value_prop
static int add_value_prop(picl_nodehdl_t node_hdl, const char *prop_name,
err = add_value_prop(node_hdl, PICL_PROP_LOW_WARNING,
err = add_value_prop(node_hdl, PICL_PROP_LOW_SHUTDOWN,
err = add_value_prop(node_hdl, PICL_PROP_LOW_POWER_OFF,
err = add_value_prop(node_hdl, PICL_PROP_HIGH_WARNING,
err = add_value_prop(node_hdl, PICL_PROP_HIGH_SHUTDOWN,
err = add_value_prop(node_hdl, PICL_PROP_HIGH_POWER_OFF,