asoc: kona: Fix to apply wsa8810 gain settings

Update wsa aux codec matching logic in machine driver
to apply proper gain settings for wsa8810 variant.
Add null check for aux component name to avoid dereference.

Change-Id: Ie332f8e37a2d6b7a250fe299df91fa9cf9d7636b
Signed-off-by: Meng Wang <mengw@codeaurora.org>