drm/tegra: Remove dma_buf->k(un)map

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Reviewed-by: Thierry Reding <treding@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: linux-tegra@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20191118103536.17675-9-daniel.vetter@ffwll.ch

drivers/gpu/drm/tegra/gem.c

@@ -554,16 +554,6 @@ static int tegra_gem_prime_end_cpu_access(struct dma_buf *buf,
 	return 0;
 }
 
-static void *tegra_gem_prime_kmap(struct dma_buf *buf, unsigned long page)
-{
-	return NULL;
-}
-
-static void tegra_gem_prime_kunmap(struct dma_buf *buf, unsigned long page,
-				   void *addr)
-{
-}
-
 static int tegra_gem_prime_mmap(struct dma_buf *buf, struct vm_area_struct *vma)
 {
 	struct drm_gem_object *gem = buf->priv;
@@ -594,8 +584,6 @@ static const struct dma_buf_ops tegra_gem_prime_dmabuf_ops = {
 	.release = tegra_gem_prime_release,
 	.begin_cpu_access = tegra_gem_prime_begin_cpu_access,
 	.end_cpu_access = tegra_gem_prime_end_cpu_access,
-	.map = tegra_gem_prime_kmap,
-	.unmap = tegra_gem_prime_kunmap,
 	.mmap = tegra_gem_prime_mmap,
 	.vmap = tegra_gem_prime_vmap,
 	.vunmap = tegra_gem_prime_vunmap,