drm/nouveau/nvif: split out fifo interface definitions

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_chan.c b/drivers/gpu/drm/nouveau/nouveau_chan.c
index 0a853ad..d9c784c 100644
--- a/drivers/gpu/drm/nouveau/nouveau_chan.c
+++ b/drivers/gpu/drm/nouveau/nouveau_chan.c
@@ -24,6 +24,10 @@
 
 #include <nvif/os.h>
 #include <nvif/class.h>
+#include <nvif/cl006b.h>
+#include <nvif/cl506f.h>
+#include <nvif/cl906f.h>
+#include <nvif/cla06f.h>
 #include <nvif/ioctl.h>
 
 /*XXX*/