drm/etnaviv: Remove empty etnaviv_gem_prime_vunmap()

The function etnaviv_gem_prime_vunmap() is empty. Remove it before
changing the interface to use struct drm_buf_map.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Christian König <christian.koenig@amd.com>
Tested-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201103093015.1063-4-tzimmermann@suse.de

drivers/gpu/drm/etnaviv/etnaviv_drv.h

@@ -52,7 +52,6 @@ int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma);
 int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset);
 struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj);
 void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj);
-void etnaviv_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
 int etnaviv_gem_prime_mmap(struct drm_gem_object *obj,
 			   struct vm_area_struct *vma);
 struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev,

drivers/gpu/drm/etnaviv/etnaviv_gem.c

@@ -571,7 +571,6 @@ static const struct drm_gem_object_funcs etnaviv_gem_object_funcs = {
 	.unpin = etnaviv_gem_prime_unpin,
 	.get_sg_table = etnaviv_gem_prime_get_sg_table,
 	.vmap = etnaviv_gem_prime_vmap,
-	.vunmap = etnaviv_gem_prime_vunmap,
 	.vm_ops = &vm_ops,
 };
 

drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c

@@ -27,11 +27,6 @@ void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj)
 	return etnaviv_gem_vmap(obj);
 }
 
-void etnaviv_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
-{
-	/* TODO msm_gem_vunmap() */
-}
-
 int etnaviv_gem_prime_mmap(struct drm_gem_object *obj,
 			   struct vm_area_struct *vma)
 {