powerpc/512x: add MPC8308 dma support

MPC8308 has pretty much the same DMA controller as MPC5121 and
this patch adds support for MPC8308 to the mpc512x_dma driver.

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Acked-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 6ee2359..ef13873 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -109,7 +109,7 @@
 
 config MPC512X_DMA
 	tristate "Freescale MPC512x built-in DMA engine support"
-	depends on PPC_MPC512x
+	depends on PPC_MPC512x || PPC_MPC831x
 	select DMA_ENGINE
 	---help---
 	  Enable support for the Freescale MPC512x built-in DMA engine.