watchdog: at91sam9: use endian agnostic IO

Use endian agnostic IO functions for the watchdog driver for when it
is enabled on ATSAMA5D36 devices running in big endian.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/at91sam9_wdt.c

@@ -40,9 +40,9 @@
 #define DRV_NAME "AT91SAM9 Watchdog"
 
 #define wdt_read(wdt, field) \
-	__raw_readl((wdt)->base + (field))
+	readl_relaxed((wdt)->base + (field))
 #define wdt_write(wtd, field, val) \
-	__raw_writel((val), (wdt)->base + (field))
+	writel_relaxed((val), (wdt)->base + (field))
 
 /* AT91SAM9 watchdog runs a 12bit counter @ 256Hz,
  * use this to convert a watchdog