ARM: dts: msm: add device node for audio sound card

Add sound card for 8939 external codec over slimbus.
Possible external codec support added for wcd9330 and
wcd9306.

Change-Id: I5319caa6d7ad4f7ddbf9595593a7d94d169624af
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>