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>
         */
        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;