[PATCH] make vt_ioctl ix86isms explicit

sys_ioperm is only implemented on x86 (i386/x86_64).  Make the
ifdefs in vt_ioctl.c more explicit so the other architectures can
get rid of their stubs in favour of just using sys_ni_syscall in
the syscall table.

Maybe we should remove it altogether, it looks like remnants from
some very early X386 times (ie the Thomas Roell timeframe).

drivers/char/vt_ioctl.c

@@ -59,7 +59,7 @@ struct vt_struct *vt_cons[MAX_NR_CONSOLES];
  */
 unsigned char keyboard_type = KB_101;
 
-#if !defined(__alpha__) && !defined(__ia64__) && !defined(__mips__) && !defined(__arm__) && !defined(__sh__)
+#ifdef CONFIG_X86
 asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int on);
 #endif
 
@@ -424,11 +424,13 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
 		ucval = keyboard_type;
 		goto setchar;
 
-#if !defined(__alpha__) && !defined(__ia64__) && !defined(__mips__) && !defined(__arm__) && !defined(__sh__)
 		/*
 		 * These cannot be implemented on any machine that implements
-		 * ioperm() in user level (such as Alpha PCs).
+		 * ioperm() in user level (such as Alpha PCs) or not at all.
+		 *
+		 * XXX: you should never use these, just call ioperm directly..
 		 */
+#ifdef CONFIG_X86
 	case KDADDIO:
 	case KDDELIO:
 		/*