Blackfin: boards: update ASoC resources after machine driver overhaul

Now that the Blackfin machine drivers have been updated to the
multicomponent support, update the resources to match.  The pin
settings are now a board issue and removed from the driver.

Signed-off-by: Scott Jiang <scott.jiang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>