drivers: qmi-cooling: Add modem skin mitigation device

Add support for modem skin cooling device, by enabling the driver to
accept a modem QMI based cooling device named modem_skin.

Change-Id: Id89d5c79731fdcb235566a54d8eabaa047e9472a
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>