ASoC: SOF: Intel: hda: correct ROM state mask

The ROM state is represented by the 24 LSB bits in the ROM status
register, so the mask should be 0xffffff instead of 0xf.

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190722141402.7194-11-pierre-louis.bossart@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>