ARM: dts: msm: Add codec and WSA device entries

Add snapshot for audio device tree for MSM targets. The code is
migrated from msm-3.10 kernel at the below commit -
ef68df2a5ef9f0e94a4425205bfd7f84406667c8
(Merge "Input: optimize events_per_packet count calculation")

Resolved dtsi entries for pin control convention as per 3.18

Change-Id: Iad9ceaea4cb93e2eb36f08df0990c5cd63507cc4
Signed-off-by: Asish Bhattacharya <asishb@codeaurora.org>