ASoC: JZ4740: Add qi_lb60 board driver

This patch adds ASoC support for the qi_lb60 board.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>