thermal: ti-soc-thermal: Do not print error message in the EPROBE_DEFER case

Avoid printing the error message in the EPROBE_DEFER case
where registering cpu cooling at ti-soc-thermal thermal driver.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>