When registering audio cards for the handsfree and gateway roles we
need a way for our users to differentiate between both to decide which
of them they start using for their purpose.
This will be used by the drivers that a given codec was negotiated
for a card.
It will return FALSE if the codec can't be used. For example, if the selected
codec is mSBC and defer setup is not supported by the kernel.
As we can assume that the CVSD codec will be always available, the only
information that we need to export is if we have support for wideband
codecs. Right now only mSBC is defined as wideband.