soc: qcom: qcom_aoss: Add missing description for 'cooling_devs'

soc: qcom: qcom_aoss: Add missing description for 'cooling_devs'

Fixes the following W=1 kernel build warning(s):

 drivers/soc/qcom/qcom_aoss.c:86: warning: Function parameter or member 'cooling_devs' not described in 'qmp'

Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: linux-arm-msm@vger.kernel.org
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20201103152838.1290217-4-lee.jones@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>