staging: vchiq_arm: Use g_dma_dev for dma_unmap_sg

Commit "staging: vchiq_arm: Clean up 40-bit DMA support" failed to
change one of the calls to dma_unmap_sg to pass in g_dma_dev (rather
than g_dev). Correct that oversight.

See: #3647

Signed-off-by: Phil Elwell <[email protected]>

Author: pelwell

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c

@@ -641,7 +641,7 @@ free_pagelist(struct vchiq_pagelist_info *pagelistinfo,
 	 * NOTE: dma_unmap_sg must be called before the
 	 * cpu can touch any of the data/pages.
 	 */
-	dma_unmap_sg(g_dev, pagelistinfo->scatterlist,
+	dma_unmap_sg(g_dma_dev, pagelistinfo->scatterlist,
 		     pagelistinfo->num_pages, pagelistinfo->dma_dir);
 	pagelistinfo->scatterlist_mapped = 0;