ASoC: byt-rt5640: Fix snd_soc_dapm_ignore_suspend() calls

To work properly snd_soc_dapm_ignore_suspend() needs to be called on
endpoint widgets. In this case those are the board level Speaker and
Headphone widgets and not the CODEC output widgets that are connected to
them.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>