CHROMIUM: ASoC: max98095 - allow to select MCLK source

CHROMIUM: ASoC: max98095 - allow to select MCLK source

The codec clock can come from either MCLK1 or MCLK2 pin.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BUG=chrome-os-partner:17343
TEST=emerge-daisy_spring chromeos-kernel
play sound on Snow with the codec on MCLK1, on Spring proto-1 with the codec
on MCLK2.

Change-Id: Ic82158c63f8fb5c8eb00771e9a1cbf186d561670
Reviewed-on: https://gerrit.chromium.org/gerrit/41876
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>