The fsl_ssi driver will possibly be shared between Freescale PowerPC
and ARM/IMX families, so give it a separate Kconfig option.  Then
fsl_ssi driver can possibly be selected independently from selecting
PowerPC DMA based PCM driver.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Acked-by: NSascha Hauer <s.hauer@pengutronix.de>
Acked-by: NTimur Tabi <timur@freescale.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>