poppy: Enable sound path for dev mode beep

Enable GPIO I2S interface max98927 codec driver to provide
a path for dev mode beep.
These changes are cloned from eve, with minor modifications.

BUG=None
BRANCH=None
TEST=Boot beep works on poppy

Change-Id: I4e98a4fa9af1395307ce2c541cdc65762121a46c
Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/428610
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
2 files changed