ASoC: Intel: common: fix copy/paste issue with SOF/broadwell topology file

There are two commercially-available Broadwell platforms based on I2S
(Dell XPS13 and 'Samus' Pixel 2015 Chromebook).

Fix a copy/paste issue to allow each platform to enable different
features if needed when SOF is enabled

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>