blackfin: include <linux/compiler.h> rather than define __iomem

The macro __iomem is defined in include/linux/compiler.h.
Let's include it rather than double __iomem defines.
Signed-off-by: NMasahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Sonic Zhang <sonic.adi@gmail.com>

arch/blackfin/include/asm/io.h

@@ -11,10 +11,9 @@
 
 #ifdef __KERNEL__
 
+#include <linux/compiler.h>
 #include <asm/blackfin.h>
 
-#define __iomem
-
 static inline void sync(void)
 {
 	SSYNC();

drivers/block/pata_bfin.h

@@ -43,7 +43,6 @@ struct ata_port {
 
 #define DRV_NAME		"pata-bfin"
 #define DRV_VERSION		"0.9"
-#define __iomem
 
 #define ATA_REG_CTRL		0x0E
 #define ATA_REG_ALTSTATUS	ATA_REG_CTRL