amdgpu: use VM_ACCESS_FLAGS

Simplify VM_READ|VM_WRITE|VM_EXEC with VM_ACCESS_FLAGS.

Link: https://lkml.kernel.org/r/20221019034945.93081-6-wangkefeng.wang@huawei.comSigned-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: "Pan, Xinhui" <Xinhui.Pan@amd.com>
Cc: David Airlie <airlied@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c

@@ -255,7 +255,7 @@ static int amdgpu_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_str
 	 * becoming writable and makes is_cow_mapping(vm_flags) false.
 	 */
 	if (is_cow_mapping(vma->vm_flags) &&
-	    !(vma->vm_flags & (VM_READ | VM_WRITE | VM_EXEC)))
+	    !(vma->vm_flags & VM_ACCESS_FLAGS))
 		vma->vm_flags &= ~VM_MAYWRITE;
 
 	return drm_gem_ttm_mmap(obj, vma);