For debug, the kernel debugfs mechanism is available. We can add various
debug options for driver like module configuration read, firmware register
read etc.

This patch adds debugfs as a child to asoc plaform component and caller is
added for skylake driver to do init and cleanup of debugfs.
Signed-off-by: NVinod Koul <vinod.koul@intel.com>
Signed-off-by: NVunny Sodhi <vunnyx.sodhi@intel.com>
Signed-off-by: NGuneshwor Singh <guneshwor.o.singh@intel.com>
Signed-off-by: NMark Brown <broonie@kernel.org>