ata: pata_ftide010: Remove unneeded ERROR check before clk_disable_unprepare

ERROR check is already in clk_disable() and clk_unprepare() by using
IS_ERR_OR_NULL. Remove unneeded ERROR check for ftide->pclk here.
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>

drivers/ata/pata_ftide010.c

@@ -536,8 +536,8 @@ static int pata_ftide010_probe(struct platform_device *pdev)
 	return 0;
 
 err_dis_clk:
-	if (!IS_ERR(ftide->pclk))
 	clk_disable_unprepare(ftide->pclk);
+
 	return ret;
 }
 
@@ -547,7 +547,6 @@ static int pata_ftide010_remove(struct platform_device *pdev)
 	struct ftide010 *ftide = host->private_data;
 
 	ata_host_detach(ftide->host);
-	if (!IS_ERR(ftide->pclk))
 	clk_disable_unprepare(ftide->pclk);
 
 	return 0;