mmc: sdhci-esdhc-imx: add clk_prepare/clk_unprepare

It's for migrating to generic clk framework API.

Signed-off-by: Richard Zhao <richard.zhao@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers/mmc/host/sdhci-esdhc-imx.c

@@ -463,7 +463,7 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 		err = PTR_ERR(clk);
 		goto err_clk_get;
 	}
-	clk_enable(clk);
+	clk_prepare_enable(clk);
 	pltfm_host->clk = clk;
 
 	if (!is_imx25_esdhc(imx_data))
@@ -558,7 +558,7 @@ no_card_detect_irq:
 		gpio_free(boarddata->wp_gpio);
 no_card_detect_pin:
 no_board_data:
-	clk_disable(pltfm_host->clk);
+	clk_disable_unprepare(pltfm_host->clk);
 	clk_put(pltfm_host->clk);
 err_clk_get:
 	kfree(imx_data);
@@ -585,7 +585,7 @@ static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)
 		gpio_free(boarddata->cd_gpio);
 	}
 
-	clk_disable(pltfm_host->clk);
+	clk_disable_unprepare(pltfm_host->clk);
 	clk_put(pltfm_host->clk);
 	kfree(imx_data);