linux-phytec-fsl

MLK-13574-3: ARM: dts: enable audio in a seperate dts

Audio is in M4 domain, so we need an indepenent dts for audio.
M4 domain is controled by RTOS, this dts is for demo purpose in
linux

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>