mmc: sdhci-pxav3: Remove checks for optional core clock in error/remove path

Commit 63589e92c2d9 ("clk: Ignore error and NULL pointers passed to
clk_{unprepare, disable}()") allows NULL or error pointer to be passed
unconditionally.

This patch is to simplify probe error and remove code paths.

However, we reserve the core clock checks in runtime suspend/resume code
because we want a little smaller latency.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-pxav3.c

@@ -398,8 +398,7 @@ err_of_parse:
 err_cd_req:
 err_mbus_win:
 	clk_disable_unprepare(pxa->clk_io);
-	if (!IS_ERR(pxa->clk_core))
-		clk_disable_unprepare(pxa->clk_core);
+	clk_disable_unprepare(pxa->clk_core);
 err_clk_get:
 	sdhci_pltfm_free(pdev);
 	return ret;
@@ -418,8 +417,7 @@ static int sdhci_pxav3_remove(struct platform_device *pdev)
 	sdhci_remove_host(host, 1);
 
 	clk_disable_unprepare(pxa->clk_io);
-	if (!IS_ERR(pxa->clk_core))
-		clk_disable_unprepare(pxa->clk_core);
+	clk_disable_unprepare(pxa->clk_core);
 
 	sdhci_pltfm_free(pdev);