[PATCH] dmi_scan warning fix

dmi_dump_system() is only used if CONFIG_ACPI_BOOT.

arch/i386/kernel/dmi_scan.c

@@ -162,6 +162,8 @@ enum
 
 static char *dmi_ident[DMI_STRING_MAX];
 
+#ifdef CONFIG_ACPI_BOOT
+
 /* print some information suitable for a blacklist entry. */
 static void dmi_dump_system(void)
 { 
@@ -176,6 +178,8 @@ static void dmi_dump_system(void)
 	       dmi_ident[DMI_BOARD_VERSION]); 
 } 
 
+#endif
+
 /*
  *	Save a DMI string
  */