ASoC: pxa2xx-i2s: Remove unused DAI ID defines

ASoC: pxa2xx-i2s: Remove unused DAI ID defines

The DAI ID defines are back from the time when DAIs were referenced by a
numerical ID. These days a string is used for matching instead and the
defines are unused. This particular ID was never used and presumably never
will be, so remove it.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>