ASoC: apq8009: add changes to enable lpass_mclk for apq8009

Modify audio_ref_clk_probe and lpass_mclk_prepare functions to read lpass
gpio register and lpass-clock values from dtsi to enable lpass_mclk.

Enable LPASS_CLK_VER_2 and use cdc digital clock support for apq8009
target.

Change-Id: I5532d274b51cb69fbb58e39dd8f48bb3a8d10039
Signed-off-by: Raja Mallik <rmallik@codeaurora.org>
Signed-off-by: Chinkit Kumar,Kirti Kumar Parmar <parma@codeaurora.org>
Signed-off-by: Raja Mallik <rmallik@codeaurora.org>