sdhci: remove useless set_clock() check

When using QUIRK_NONSTANDARD_CLOCK, it checks the set_clock() function
which is not used actually.  So delete it.
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/mmc/host/sdhci.c

@@ -1787,7 +1787,7 @@ int sdhci_add_host(struct sdhci_host *host)
 	 */
 	mmc->ops = &sdhci_ops;
 	if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK &&
-			host->ops->set_clock && host->ops->get_min_clock)
+			host->ops->get_min_clock)
 		mmc->f_min = host->ops->get_min_clock(host);
 	else
 		mmc->f_min = host->max_clk / 256;