MIPS: ralink: add memory definition to struct ralink_soc_info

Depending on the actual SoC we have a different base address as well as minimum
and maximum size for RAM. Add these fields to the per SoC structure.
Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5179/

arch/mips/ralink/common.h

@@ -33,6 +33,11 @@ extern struct ralink_pinmux rt_gpio_pinmux;
 struct ralink_soc_info {
 	unsigned char sys_type[RAMIPS_SYS_TYPE_LEN];
 	unsigned char *compatible;
+
+	unsigned long mem_base;
+	unsigned long mem_size;
+	unsigned long mem_size_min;
+	unsigned long mem_size_max;
 };
 extern struct ralink_soc_info soc_info;