Don't load the acpi module.

sys/boot/pc98/libpc98/Makefile

@@ -28,7 +28,6 @@ CFLAGS+= -DTERM_EMU
 CFLAGS+=	-DPC98
 CFLAGS+=	-I${.CURDIR}/../../common -I${.CURDIR}/../btx/lib \
 		-I${.CURDIR}/../../i386/libi386 \
-		-I${.CURDIR}/../../../contrib/dev/acpica \
 		-I${.CURDIR}/../../.. -I.
 # the location of libstand
 CFLAGS+=	-I${.CURDIR}/../../../../lib/libstand/

sys/boot/pc98/libpc98/i386_module.c

@@ -0,0 +1,34 @@
+/*-
+ * Copyright (c) 2003 TAKAHASHI Yoshihiro <nyan@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+int
+i386_autoload(void)
+{
+
+    return 0;
+}