drivers: thermal: qmi_cooling: Add support for modem_v2x cooling device

Add support for 'modem_v2x' QMI cooling device to qmi cooling device
driver. This cooling device can be used to mitigate modem CV2X at high
temperature via qmi interface.

Change-Id: Ie6cf8e2174afbc4a25619e1002a5c0937fd5ba41
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>