microblaze: io.h: Add io big-endian function

Add new io big-endian function. They will be used
for uartlite and spi driver.
Signed-off-by: NJohn Linn <john.linn@xilinx.com>
Signed-off-by: NMichal Simek <monstr@monstr.eu>

arch/microblaze/include/asm/io.h

@@ -108,6 +108,11 @@ static inline void writel(unsigned int v, volatile void __iomem *addr)
 #define iowrite16(v, addr)	__raw_writew((u16)(v), (u16 *)(addr))
 #define iowrite32(v, addr)	__raw_writel((u32)(v), (u32 *)(addr))
 
+#define ioread16be(addr)	__raw_readw((u16 *)(addr))
+#define ioread32be(addr)	__raw_readl((u32 *)(addr))
+#define iowrite16be(v, addr)	__raw_writew((u16)(v), (u16 *)(addr))
+#define iowrite32be(v, addr)	__raw_writel((u32)(v), (u32 *)(addr))
+
 /* These are the definitions for the x86 IO instructions
  * inb/inw/inl/outb/outw/outl, the "string" versions
  * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions