Build x86bios only for i386/amd64 for now. More work is required

to make these functional on other architectures, and the current
code breaks sparc64 and powerpc.

Spotted by:	tinderbox via des

sys/amd64/conf/NOTES

@@ -160,6 +160,11 @@ options 	VESA
 # Turn on extra debugging checks and output for VESA support.
 options 	VESA_DEBUG
 
+device		dpms		# DPMS suspend & resume via VESA BIOS
+
+# x86 real mode BIOS emulator, required by atkbdc/dpms/vesa
+options		X86BIOS
+
 #
 # Optional devices:
 #

sys/conf/NOTES

@@ -2757,5 +2757,3 @@ options 	AAC_DEBUG	# Debugging levels:
 options 	BROOKTREE_ALLOC_PAGES=(217*4+1)
 options 	MAXFILES=999
 
-# x86 real mode emulator
-options		X86BIOS

sys/i386/conf/NOTES

@@ -361,6 +361,9 @@ options 	VESA_DEBUG
 
 device		dpms		# DPMS suspend & resume via VESA BIOS
 
+# x86 real mode BIOS emulator, required by atkbdc/dpms/vesa
+options		X86BIOS
+
 #
 # The Numeric Processing eXtension driver.  This is non-optional.
 device		npx

sys/modules/Makefile

@@ -298,7 +298,7 @@ SUBDIR=	${_3dfx} \
 	wlan_xauth \
 	${_wpi} \
 	${_wpifw} \
-	x86bios \
+	${_x86bios} \
 	${_xe} \
 	xfs \
 	xl \
@@ -456,6 +456,7 @@ _padlock=	padlock
 _s3=		s3
 _twa=		twa
 _vesa=		vesa
+_x86bios=	x86bios
 .elif ${MACHINE} == "pc98"
 _canbepm=	canbepm
 _canbus=	canbus
@@ -539,6 +540,7 @@ _sppp=		sppp
 _tmpfs=		tmpfs
 _twa=		twa
 _vesa=		vesa
+_x86bios=	x86bios
 _wi=		wi
 _wpi=		wpi
 _wpifw=		wpifw