drm/radeon: cleanup VM id handling a bit

Store a reference to the VM into the IB structure, that
makes calculating the IBs address a bit less complicated.

Signed-off-by: Christian König <deathsimple@vodafone.de>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index a1c4d4d..a5470e7 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -592,7 +592,7 @@
 	uint32_t			*ptr;
 	int				ring;
 	struct radeon_fence		*fence;
-	unsigned			vm_id;
+	struct radeon_vm		*vm;
 	bool				is_const_ib;
 	struct radeon_fence		*sync_to[RADEON_NUM_RINGS];
 	struct radeon_semaphore		*semaphore;
@@ -734,7 +734,8 @@
 };
 
 int radeon_ib_get(struct radeon_device *rdev, int ring,
-		  struct radeon_ib *ib, unsigned size);
+		  struct radeon_ib *ib, struct radeon_vm *vm,
+		  unsigned size);
 void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib *ib);
 int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib,
 		       struct radeon_ib *const_ib);