mmc: sdhci: use f_max instead of host->clock for timeouts

When timeout_clk is calculated the host->clock could be zero.
So, instead of host->clock the calculation now uses mmc->f_max.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/host/sdhci.c

@@ -2505,12 +2505,9 @@ int sdhci_add_host(struct sdhci_host *host)
 		host->timeout_clk *= 1000;
 
 	if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)
-		host->timeout_clk = host->clock / 1000;
+		host->timeout_clk = mmc->f_max / 1000;
 
-	if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)
-		mmc->max_discard_to = (1 << 27) / (mmc->f_max / 1000);
-	else
-		mmc->max_discard_to = (1 << 27) / host->timeout_clk;
+	mmc->max_discard_to = (1 << 27) / host->timeout_clk;
 
 	mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23;