ARM: mmci: no need for separate host->data_xfered

We don't need to store the number of bytes transferred in our host
structure - we can store this directly in data->bytes_xfered.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/mmc/host/mmci.h

@@ -161,8 +161,6 @@ struct mmci_host {
 	int			gpio_cd_irq;
 	bool			singleirq;
 
-	unsigned int		data_xfered;
-
 	spinlock_t		lock;
 
 	unsigned int		mclk;