dma-debug: remove CONFIG_HAVE_DMA_API_DEBUG

There is no arch specific code required for dma-debug, so there is no
need to opt into the support either.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>

lib/Kconfig.debug

@@ -1634,7 +1634,6 @@ config PROVIDE_OHCI1394_DMA_INIT
 
 config DMA_API_DEBUG
 	bool "Enable debugging of DMA-API usage"
-	depends on HAVE_DMA_API_DEBUG
 	help
 	  Enable this option to debug the use of the DMA API by device drivers.
 	  With this option you will be able to detect common bugs in device