ASoC: Fix null string usage with WM8753 DAIs

The WM8753 driver multiplexes the DAI structures it exposes to the
outside world, leaving them uninitialised until the codec probes.  Since
the DAI name is used during the registration and setup process provide a
dummy name.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
1 file changed