dma-mapping: fix DMA_OPS dependencies

Driver that select DMA_OPS need to depend on HAS_DMA support to
work.  The vop driver was missing that dependency, so add it, and also
add a another depends in DMA_OPS itself.  That won't fix the issue due
to how the Kconfig dependencies work, but at least produce a warning
about unmet dependencies.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>

drivers/misc/mic/Kconfig

@@ -35,6 +35,7 @@ config SCIF_BUS
 
 config VOP_BUS
 	tristate "VOP Bus Driver"
+	depends on HAS_DMA
 	select DMA_OPS
 	help
 	  This option is selected by any driver which registers a

kernel/dma/Kconfig

@@ -9,6 +9,7 @@ config HAS_DMA
 	default y
 
 config DMA_OPS
+	depends on HAS_DMA
 	bool
 
 #