[ARM] 5111/2: zylonite: Configure SSP

SSP3 is connected to the voice PCM of the WM9713 audio codec on the
Zylonite so configure the MFPs appropriately and select SSP support.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>