mmc: mtk-sd: Fix missing clk_disable_unprepare in msdc_of_clock_parse()

The clk_disable_unprepare() should be called in the error handling
of devm_clk_bulk_get_optional, fix it by replacing devm_clk_get_optional
and clk_prepare_enable by devm_clk_get_optional_enabled.

Fixes: f5eccd94 ("mmc: mediatek: Add subsys clock control for MT8192 msdc")
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20221125090141.3626747-1-cuigaosheng1@huawei.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/mtk-sd.c

@@ -2588,13 +2588,11 @@ static int msdc_of_clock_parse(struct platform_device *pdev,
 			return PTR_ERR(host->src_clk_cg);
 	}
 
-	host->sys_clk_cg = devm_clk_get_optional(&pdev->dev, "sys_cg");
+	/* If present, always enable for this clock gate */
+	host->sys_clk_cg = devm_clk_get_optional_enabled(&pdev->dev, "sys_cg");
 	if (IS_ERR(host->sys_clk_cg))
 		host->sys_clk_cg = NULL;
 
-	/* If present, always enable for this clock gate */
-	clk_prepare_enable(host->sys_clk_cg);
-
 	host->bulk_clks[0].id = "pclk_cg";
 	host->bulk_clks[1].id = "axi_cg";
 	host->bulk_clks[2].id = "ahb_cg";