mmc: pxamci: fix read-only gpio detection polarity

The commit converting pxamci to slot-gpio API inverted the logic of the
read-only gpio. Fix it by inverting the logic again.

Fixes: fd546ee6a7dc ("mmc: pxamci: fix card detect with slot-gpio API")
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/pxamci.c

@@ -805,7 +805,7 @@ static int pxamci_probe(struct platform_device *pdev)
 		goto out;
 	} else {
 		mmc->caps |= host->pdata->gpio_card_ro_invert ?
-			MMC_CAP2_RO_ACTIVE_HIGH : 0;
+			0 : MMC_CAP2_RO_ACTIVE_HIGH;
 	}
 
 	if (gpio_is_valid(gpio_cd))