mmc: sdhci-of-dwcmshc: set MMC_CAP_WAIT_WHILE_BUSY

The host supports HW busy detection of the device busy signaling over
dat0 line. Set MMC_CAP_wAIT_WHILE_BUSY host capability.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20210324154703.69f97fde@xhacker.debian
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-of-dwcmshc.c

@@ -416,6 +416,8 @@ static int dwcmshc_probe(struct platform_device *pdev)
 			goto err_clk;
 	}
 
+	host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;
+
 	err = sdhci_add_host(host);
 	if (err)
 		goto err_clk;