[MMC] Allow detection/removal to be delayed

Change mmc_detect_change() to take a delay argument such that
the detection of card insertions and removals can be delayed
according to the requirements of the host driver or platform.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/mmc/mmci.c

@@ -442,7 +442,7 @@ static void mmci_check_status(unsigned long data)
 
 	status = host->plat->status(mmc_dev(host->mmc));
 	if (status ^ host->oldstat)
-		mmc_detect_change(host->mmc);
+		mmc_detect_change(host->mmc, 0);
 
 	host->oldstat = status;
 	mod_timer(&host->timer, jiffies + HZ);