mips: ralink: rt3883: define RT3883_SYSC_BASE with __iomem

So that RT3883_SYSC_BASE can be used later in multiple functions without
needing to repeat this __iomem declaration each time
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/include/asm/mach-ralink/rt3883.h

@@ -10,8 +10,10 @@
 
 #include <linux/bitops.h>
 
+#define IOMEM(x)		((void __iomem *)(KSEG1ADDR(x)))
+
 #define RT3883_SDRAM_BASE	0x00000000
-#define RT3883_SYSC_BASE	0x10000000
+#define RT3883_SYSC_BASE	IOMEM(0x10000000)
 #define RT3883_TIMER_BASE	0x10000100
 #define RT3883_INTC_BASE	0x10000200
 #define RT3883_MEMC_BASE	0x10000300

arch/mips/ralink/rt3883.c

@@ -72,15 +72,14 @@ void __init ralink_of_remap(void)
 
 void __init prom_soc_init(struct ralink_soc_info *soc_info)
 {
-	void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT3883_SYSC_BASE);
 	const char *name;
 	u32 n0;
 	u32 n1;
 	u32 id;
 
-	n0 = __raw_readl(sysc + RT3883_SYSC_REG_CHIPID0_3);
-	n1 = __raw_readl(sysc + RT3883_SYSC_REG_CHIPID4_7);
-	id = __raw_readl(sysc + RT3883_SYSC_REG_REVID);
+	n0 = __raw_readl(RT3883_SYSC_BASE + RT3883_SYSC_REG_CHIPID0_3);
+	n1 = __raw_readl(RT3883_SYSC_BASE + RT3883_SYSC_REG_CHIPID4_7);
+	id = __raw_readl(RT3883_SYSC_BASE + RT3883_SYSC_REG_REVID);
 
 	if (n0 == RT3883_CHIP_NAME0 && n1 == RT3883_CHIP_NAME1) {
 		soc_info->compatible = "ralink,rt3883-soc";