tty,vt: fix VT_SETACTIVATE console switch

using VT_SETACTIVATE ioctl for console switch did not work,
since it put wrong param to the set_console function.

Also ioctl returned misleading error, because of the missing
break statement. I wonder anyone has ever used this one :).
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/tty/vt/vt_ioctl.c

@@ -1010,8 +1010,9 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
 			if (ret)
 				break;
 			/* Commence switch and lock */
-			set_console(arg);
+			set_console(vsa.console);
 		}
+		break;
 	}
 
 	/*