mmc: sdhci: revert "mmc: sdhci: Claer high speed if not supported"

This "commit 42979002" is wrong.
SDHCI_QUIRK_NO_HISPD_BIT is for skipping to set CTRL_HISPD bit.

For example, Exynos didn't have CTRL_HISPD. But Highspeed mode
is supported.
(This quirks doesn't mean  that driver didn't support the Highseepd mode.)

Note: If driver didn't support the Highspeed Mode, use or add the other
quirks.

After applied this patch, all Exynos SoCs are just running with 25MHz.
Signed-off-by: NJaehoon Chung <jh80.chung@samsung.com>

drivers/mmc/sdhci.c

@@ -554,9 +554,6 @@ int sdhci_setup_cfg(struct mmc_config *cfg, const char *name, int buswidth,
 			cfg->host_caps |= MMC_MODE_8BIT;
 	}
 
-	if (quirks & SDHCI_QUIRK_NO_HISPD_BIT)
-		cfg->host_caps &= ~(MMC_MODE_HS | MMC_MODE_HS_52MHz);
-
 	if (host_caps)
 		cfg->host_caps |= host_caps;