gianfar: use more portable i/o accessors

in/out_be32 accessors are Power arch centric whereas
ioread/writebe32 are available in other arches.  Also, unlike
in/out_be32, ioread/writebe32 expect non-volatile address arguments.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/gianfar.h

@@ -1136,16 +1136,16 @@ static inline int gfar_has_errata(struct gfar_private *priv,
 	return priv->errata & err;
 }
 
-static inline u32 gfar_read(volatile unsigned __iomem *addr)
+static inline u32 gfar_read(unsigned __iomem *addr)
 {
 	u32 val;
-	val = in_be32(addr);
+	val = ioread32be(addr);
 	return val;
 }
 
-static inline void gfar_write(volatile unsigned __iomem *addr, u32 val)
+static inline void gfar_write(unsigned __iomem *addr, u32 val)
 {
-	out_be32(addr, val);
+	iowrite32be(val, addr);
 }
 
 static inline void gfar_write_filer(struct gfar_private *priv,