[PATCH v1 1/2] drm/rockchip: fix build due to undefined drm_gem_cma_vm_ops

[Sam Ravnborg]

Commit 0d590af3140d ("drm/rockchip: Convert to drm_gem_object_funcs")
introduced the following build error:

rockchip_drm_gem.c:304:13: error: ‘drm_gem_cma_vm_ops’ undeclared here
  304 |  .vm_ops = &drm_gem_cma_vm_ops,
      |             ^~~~~~~~~~~~~~~~~~
      |             drm_gem_mmap_obj

Fixed by adding missing include file.

Signed-off-by: Sam Ravnborg <sam at ravnborg.org>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: Sandy Huang <hjc at rock-chips.com>
Cc: "Heiko Stübner" <heiko at sntech.de>
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-rockchip at lists.infradead.org
---
 drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
index bb3578469b03..6da15faf0192 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
@@ -10,6 +10,7 @@
 
 #include <drm/drm.h>
 #include <drm/drm_gem.h>
+#include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_prime.h>
 #include <drm/drm_vma_manager.h>
 
-- 
2.25.1