ARM: dts: msm: update codec name for internal codec on msmtitanium

To maintain  backward compatibility for cajon codec, we need to
use the same codec name in internal codec sound card. Machine
driver uses codec dai name as cajon_codec.

Change-Id: I3ebcd99109619fde50edd9d48939aca98d4edbcb
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>