[MMC] Change SDHCI version error to a warning

O2 Micro's controllers have a larger specification version value and are
therefore denied by the driver. When bypassing this check they seem to work
fine. This patch makes the code a bit more forgiving by changing the error
to a warning.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

drivers/mmc/sdhci.c

@@ -1193,10 +1193,8 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 	version = (version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT;
 	if (version != 0) {
 		printk(KERN_ERR "%s: Unknown controller version (%d). "
-			"Cowardly refusing to continue.\n", host->slot_descr,
+			"You may experience problems.\n", host->slot_descr,
 			version);
-		ret = -ENODEV;
-		goto unmap;
 	}
 
 	caps = readl(host->ioaddr + SDHCI_CAPABILITIES);