mmc: atmel-mci: use endian agnostic IO

Change the __raw IO functions to endian agnostic relaxed ones to allow
the driver to function on big endian ARM systems.
Signed-off-by: NBen Dooks <ben.dooks@codethink.co.uk>
Acked-by: NLudovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/atmel-mci-regs.h

@@ -135,10 +135,17 @@
 #define ATMCI_REGS_SIZE		0x100
 
 /* Register access macros */
-#define atmci_readl(port,reg)				\
+#ifdef CONFIG_AVR32
+#define atmci_readl(port, reg)			\
 	__raw_readl((port)->regs + reg)
-#define atmci_writel(port,reg,value)			\
+#define atmci_writel(port, reg, value)			\
 	__raw_writel((value), (port)->regs + reg)
+#else
+#define atmci_readl(port, reg)			\
+	readl_relaxed((port)->regs + reg)
+#define atmci_writel(port, reg, value)			\
+	writel_relaxed((value), (port)->regs + reg)
+#endif
 
 /* On AVR chips the Peripheral DMA Controller is not connected to MCI. */
 #ifdef CONFIG_AVR32