clk: mmci: convert to clk_prepare()/clk_unprepare()

Signed-off-by: Russell King <[e-mail]>

drivers/mmc/host/mmci.c

···
 		goto host_free;
 	}
 
-	ret = clk_enable(host->clk);
+	ret = clk_prepare(host->clk);
 	if (ret)
 		goto clk_free;
+
+	ret = clk_enable(host->clk);
+	if (ret)
+		goto clk_unprep;
 
 	host->plat = plat;
 	host->variant = variant;
···
 	iounmap(host->base);
  clk_disable:
 	clk_disable(host->clk);
+ clk_unprep:
+	clk_unprepare(host->clk);
  clk_free:
 	clk_put(host->clk);
  host_free:
···
 
 		iounmap(host->base);
 		clk_disable(host->clk);
+		clk_unprepare(host->clk);
 		clk_put(host->clk);
 
 		if (host->vcc)