Move rt1015 driver code to common file to be consistent with
rt1011 and rt1015p.

No functional change.
Reviewed-by: NBard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: NYong Zhi <yong.zhi@intel.com>
Signed-off-by: NPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20211207192458.44007-1-pierre-louis.bossart@linux.intel.comSigned-off-by: NMark Brown <broonie@kernel.org>