dmaengine: bump initcall level to arch_initcall

There are dmaengine users that would like to register dma devices at
subsys_initcall time to ensure channels are available by device_initcall
time.

Cc: Maciej Sosnowski <maciej.sosnowski@intel.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>




diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 9d3594c..403dbe7 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -318,7 +318,7 @@
 
 	return err;
 }
-subsys_initcall(dma_channel_table_init);
+arch_initcall(dma_channel_table_init);
 
 /**
  * dma_find_channel - find a channel to carry out the operation
@@ -990,6 +990,6 @@
 	mutex_init(&dma_list_mutex);
 	return class_register(&dma_devclass);
 }
-subsys_initcall(dma_bus_init);
+arch_initcall(dma_bus_init);