ARM: dts: msm: Add overlay support for msm8953 ext codec

Enable nodes required for msm8953 external codec and
disable internal codec nodes in overlay dts for msm8953-ext-codec.

Change-Id: I197e04bf271d839f5bfed779f6f8215fe11e70ec
Signed-off-by: Soumya Managoli <smanag@codeaurora.org>