dma-debug: add Kconfig entry

Impact: add a Kconfig entry for DMA-API debugging

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/arch/Kconfig b/arch/Kconfig
index 550dab2..830c16a 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -106,3 +106,5 @@
 	  The <linux/clk.h> calls support software clock gating and
 	  thus are a key power management tool on many systems.
 
+config HAVE_DMA_API_DEBUG
+	bool