Add platform device id to check whether the SSC controller support
pdc or dam for data transfer

If match "at91rm9200_ssc", which support pdc for data transfer
If match "at91sam9g45_ssc", which support dma for data transfer
Signed-off-by: NBo Shen <voice.shen@atmel.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>