ARM:bcm2708: Add Support for Wolfson Audio Card

Support for Wolfson Audio card in the BSP

Signed-off-by: Nikesh Oswal <Nikesh.Oswal@wolfsonmicro.com>
Signed-off-by: Manish Gupta <Manish.Gupta@Wolfsonmicro.com>
ASOC: RPI : Add support for Wolfson Audio Card

Support for Wolfson Audio Card.Added the machine driver.

Signed-off-by: Nikesh Oswal <Nikesh.Oswal@wolfsonmicro.com>
Signed-off-by: Manish Gupta <Manish.Gupta@Wolfsonmicro.com>
Signed-off-by: ajit.pandey <ajit88pandey@gmail.com>
config:RPI: Add config support for wolfson audio card

Signed-off-by: Manish Gupta <Manish.Gupta@cirrus.com>
Signed-off-by: ajit.pandey <ajit88pandey@gmail.com>
ASoC:RPI: DMA channels 2 and 3 to be set in FAST mode

Changing th DMA Channels 2 and 3 to be registered under
fast mode and not lite mode.Lite engine mode certainly
half the bandwidth of a normal DMA engine.

Signed-off-by: Manish Gupta <Manish.Gupta@Wolfsonmicro.com>