In PR 243056 a user reports some spamming from the driver. In
particular, the driver warns about PQI_CONF_TABLE_SECTION_SOFT_RESET
(not yet defined in the driver, but handled in Linux). The Linux driver
also does not warn about unrecognized sections.
Also do not log a warning when a device is added, since this is routine.
Lower severity to DISC, to match pqisrc_remove_device().