fbdev: mmp: Use devm_clk_get_enabled() helpers

The devm_clk_get_enabled() helpers:
    - call devm_clk_get()
    - call clk_prepare_enable() and register what is needed in order to
     call clk_disable_unprepare() when needed, as a managed resource.

This simplifies the code and avoids the calls to clk_disable_unprepare().
Signed-off-by: ying zuxin <yingzuxin@vivo.com>
Signed-off-by: Helge Deller <deller@gmx.de>

drivers/video/fbdev/mmp/hw/mmp_ctrl.c

@@ -512,16 +512,13 @@ static int mmphw_probe(struct platform_device *pdev)
 	}
 
 	/* get clock */
-	ctrl->clk = devm_clk_get(ctrl->dev, mi->clk_name);
+	ctrl->clk = devm_clk_get_enabled(ctrl->dev, mi->clk_name);
 	if (IS_ERR(ctrl->clk)) {
 		ret = PTR_ERR(ctrl->clk);
 		dev_err_probe(ctrl->dev, ret,
 			      "unable to get clk %s\n", mi->clk_name);
 		goto failed;
 	}
-	ret = clk_prepare_enable(ctrl->clk);
-	if (ret)
-		goto failed;
 
 	/* init global regs */
 	ctrl_set_default(ctrl);
@@ -556,7 +553,6 @@ static int mmphw_probe(struct platform_device *pdev)
 		path_deinit(path_plat);
 	}
 
-	clk_disable_unprepare(ctrl->clk);
 failed:
 	dev_err(&pdev->dev, "device init failed\n");