mmc: sdhci: add MMC_CAP_8_BIT_DATA in the host capabilities

This patch is necessary to gain the performance boost from 8-bit data
with the sdhci-stm driver.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/host/sdhci.c

@@ -1843,7 +1843,7 @@ int sdhci_add_host(struct sdhci_host *host)
 	mmc->caps |= MMC_CAP_SDIO_IRQ;
 
 	if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA))
-		mmc->caps |= MMC_CAP_4_BIT_DATA;
+		mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA;
 
 	if (caps & SDHCI_CAN_DO_HISPD)
 		mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;