video: exynos_dp: use clk_prepare_enable and clk_disable_unprepare

Convert clk_enable/clk_disable to clk_prepare_enable/clk_disable_unprepare
calls as required by common clock framework.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c
index cdc1398..d55470e 100644
--- a/drivers/video/exynos/exynos_dp_core.c
+++ b/drivers/video/exynos/exynos_dp_core.c
@@ -885,7 +885,7 @@
 		return PTR_ERR(dp->clock);
 	}
 
-	clk_enable(dp->clock);
+	clk_prepare_enable(dp->clock);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
@@ -956,7 +956,7 @@
 	if (pdata && pdata->phy_exit)
 		pdata->phy_exit();
 
-	clk_disable(dp->clock);
+	clk_disable_unprepare(dp->clock);
 
 	return 0;
 }
@@ -971,7 +971,7 @@
 	if (pdata && pdata->phy_exit)
 		pdata->phy_exit();
 
-	clk_disable(dp->clock);
+	clk_disable_unprepare(dp->clock);
 
 	return 0;
 }
@@ -985,7 +985,7 @@
 	if (pdata && pdata->phy_init)
 		pdata->phy_init();
 
-	clk_enable(dp->clock);
+	clk_prepare_enable(dp->clock);
 
 	exynos_dp_init_dp(dp);