drm/vmwgfx: Replace deprecated PTR_RET

Commit 508108ea2747 ("drm/vmwgfx: Don't refcount command-buffer managed
resource lookups during command buffer validation") slips in use of
deprecated PTR_RET. Use PTR_ERR_OR_ZERO instead.

As the PTR_ERR_OR_ZERO is a bit longer than PTR_RET, we introduce
local variable ret for proper indentation and line-length limits.

Signed-off-by: Lukas Bulwahn <[e-mail]>
Reviewed-by: Thomas Hellstrom <[e-mail]>
Signed-off-by: Thomas Hellstrom <[e-mail]>

drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c

···
 {
 	VMW_DECLARE_CMD_VAR(*cmd, SVGA3dCmdDXClearRenderTargetView) =
 		container_of(header, typeof(*cmd), header);
+	struct vmw_resource *ret;
 
-	return PTR_RET(vmw_view_id_val_add(sw_context, vmw_view_rt,
-					   cmd->body.renderTargetViewId));
+	ret = vmw_view_id_val_add(sw_context, vmw_view_rt,
+				  cmd->body.renderTargetViewId);
+
+	return PTR_ERR_OR_ZERO(ret);
 }
 
 /**
···
 {
 	VMW_DECLARE_CMD_VAR(*cmd, SVGA3dCmdDXClearDepthStencilView) =
 		container_of(header, typeof(*cmd), header);
+	struct vmw_resource *ret;
 
-	return PTR_RET(vmw_view_id_val_add(sw_context, vmw_view_ds,
-					   cmd->body.depthStencilViewId));
+	ret = vmw_view_id_val_add(sw_context, vmw_view_ds,
+				  cmd->body.depthStencilViewId);
+
+	return PTR_ERR_OR_ZERO(ret);
 }
 
 static int vmw_cmd_dx_view_define(struct vmw_private *dev_priv,
···
 {
 	VMW_DECLARE_CMD_VAR(*cmd, SVGA3dCmdDXGenMips) =
 		container_of(header, typeof(*cmd), header);
+	struct vmw_resource *ret;
 
-	return PTR_RET(vmw_view_id_val_add(sw_context, vmw_view_sr,
-					   cmd->body.shaderResourceViewId));
+	ret = vmw_view_id_val_add(sw_context, vmw_view_sr,
+				  cmd->body.shaderResourceViewId);
+
+	return PTR_ERR_OR_ZERO(ret);
 }
 
 /**