The prefix for the codec driver can be used during dual identical
codec usecases. However, dapm adds prefix twice for codec DAI widget
in snd_soc_dapm_add_route API.

This change is to avoid double prefix addition for codec DAI widget
and is needed while using identical dual codecs.
Signed-off-by: NSonghee Baek <sbaek@nvidia.com>
Signed-off-by: NArun Shamanna Lakshmi <aruns@nvidia.com>
Signed-off-by: NMark Brown <broonie@linaro.org>