ASoC: Intel: Skylake: Refine skl widget type check

The current check is not effective when all the widgets of a card are
involved since other widgets also can be of same type. So, make widget
type check more stringent by checking dev pointer additionally.

Signed-off-by: Guneshwor Singh <guneshwor.o.singh@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>