DMI: move dmi_available declaration to linux/dmi.h

Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/firmware/dmi-id.c b/drivers/firmware/dmi-id.c
index bc132d8..313c99c 100644
--- a/drivers/firmware/dmi-id.c
+++ b/drivers/firmware/dmi-id.c
@@ -173,8 +173,6 @@
 	if (dmi_get_system_info(_field)) \
 		sys_dmi_attributes[i++] = &sys_dmi_##_name##_attr.dev_attr.attr;
 
-extern int dmi_available;
-
 /* In a separate function to keep gcc 3.2 happy - do NOT merge this in
    dmi_id_init! */
 static void __init dmi_id_init_attr_table(void)
diff --git a/include/linux/dmi.h b/include/linux/dmi.h
index 00fc7a9..b1251b2 100644
--- a/include/linux/dmi.h
+++ b/include/linux/dmi.h
@@ -78,6 +78,7 @@
 extern void dmi_scan_machine(void);
 extern int dmi_get_year(int field);
 extern int dmi_name_in_vendors(const char *str);
+extern int dmi_available;
 
 #else
 
@@ -87,6 +88,7 @@
 	const struct dmi_device *from) { return NULL; }
 static inline int dmi_get_year(int year) { return 0; }
 static inline int dmi_name_in_vendors(const char *s) { return 0; }
+#define dmi_available 0
 
 #endif