ux500: Add DMA support for U5500

Add basic DMA configuration for u5500 supporting memcpy.
Make way for SDI0 dma support by setting SDI0 to -1,
indicating it will be configured in runtime.

Signed-off-by: Per Forlin <per.forlin@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
diff --git a/arch/arm/mach-ux500/cpu-db5500.c b/arch/arm/mach-ux500/cpu-db5500.c
index bcc0fd4..8816844 100644
--- a/arch/arm/mach-ux500/cpu-db5500.c
+++ b/arch/arm/mach-ux500/cpu-db5500.c
@@ -135,6 +135,8 @@
 
 void __init u5500_init_devices(void)
 {
+	db5500_dma_init();
+
 	db5500_add_rtc();
 
 	platform_add_devices(u5500_platform_devs,