drm/nouveau/pageflip: kick flip handling out of engsw and into fence

This is all very much a policy thing, and hence will not belong in SW
after the rework.

engsw now only handles receiving the event to say "can flip now" and makes
a callback to perform the actual work.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nvd0_display.c b/drivers/gpu/drm/nouveau/nvd0_display.c
index 715359e..2da4927 100644
--- a/drivers/gpu/drm/nouveau/nvd0_display.c
+++ b/drivers/gpu/drm/nouveau/nvd0_display.c
@@ -33,7 +33,7 @@
 #include "nouveau_crtc.h"
 #include "nouveau_dma.h"
 #include "nouveau_fb.h"
-#include "nouveau_software.h"
+#include "nouveau_fence.h"
 #include "nv50_display.h"
 
 #define EVO_DMA_NR 9
@@ -300,7 +300,7 @@
 			return ret;
 
 
-		offset  = nvc0_software_crtc(chan, nv_crtc->index);
+		offset  = nvc0_fence_crtc(chan, nv_crtc->index);
 		offset += evo->sem.offset;
 
 		BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);