drm/amdgpu: drop the GTT power of two limit

As far as I can see that isn't neccessary any more.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -942,15 +942,11 @@ static void amdgpu_check_arguments(struct amdgpu_device *adev)
 	}
 
 	if (amdgpu_gart_size != -1) {
-		/* gtt size must be power of two and greater or equal to 32M */
+		/* gtt size must be greater or equal to 32M */
 		if (amdgpu_gart_size < 32) {
 			dev_warn(adev->dev, "gart size (%d) too small\n",
 				 amdgpu_gart_size);
 			amdgpu_gart_size = -1;
-		} else if (!amdgpu_check_pot_argument(amdgpu_gart_size)) {
-			dev_warn(adev->dev, "gart size (%d) must be a power of 2\n",
-				 amdgpu_gart_size);
-			amdgpu_gart_size = -1;
 		}
 	}