dma: Add Freescale eDMA engine driver support
Add Freescale enhanced direct memory(eDMA) controller support. This module can be found on Vybrid and LS-1 SoCs. Signed-off-by: Alison Wang <b18965@freescale.com> Signed-off-by: Jingchang Lu <b35083@freescale.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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