linux-wandboard

MLK-13888-4: ARM: dts: imx6sx: update "dma" clock name to "spba"

Upstream is using "spba" clock name in the various sound drivers as
opposed to our internal tree where we have used "dma". Update all of
the dtsi files to use the new name.

Signed-off-by: Octavian Purdila <octavian.purdila@nxp.com>