drm/nouveau: add Kconfig options for debug control

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/Makefile b/drivers/gpu/drm/nouveau/Makefile
index fe14f4b..97a0919 100644
--- a/drivers/gpu/drm/nouveau/Makefile
+++ b/drivers/gpu/drm/nouveau/Makefile
@@ -2,7 +2,7 @@
 # Makefile for the drm device driver.  This driver provides support for the
 # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
 
-ccflags-y := -Iinclude/drm -DCONFIG_NOUVEAU_DEBUG=7 -DCONFIG_NOUVEAU_DEBUG_DEFAULT=3
+ccflags-y := -Iinclude/drm
 ccflags-y += -I$(src)/core/include
 ccflags-y += -I$(src)/core
 ccflags-y += -I$(src)