ARM i.MX53: mba53: add sound support

Enable the sgtl5000 found on MBa53 mainboard.
Also enable audio muxer and ssi, which are needed for sound to work.

Signed-off-by: Markus Niebel <Markus.Niebel@tqs.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>