coresight: dynamic-replicator: Clean up error handling

We fail to disable the clock in case of a failure during the
probe. Clean this up. Also, we are supposed to drop the pm reference
only when the probing is successful.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>