drivers: thermal: Add modem and wlan bandwidth cdevs to QMI devices

Add new qmi cooling devices modem_bw_backoff and wlan_bw to
qmi devices list.

Change-Id: I486a4b7beb60707a9c191336742a6c2414e61e7d
Signed-off-by: Gopala Krishna Nuthaki <gnuthaki@codeaurora.org>