Introduce CONFIG_VIRT_TO_BUS

Make some offending drivers depend on it and set CONFIG_ARCH_NO_VIRT_TO_BUS
for ppc64 so that we don't build those drivers.

This gets PowerPC allmodconfig and allyesconfig much closer to building.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Al Viro <viro@ftp.linux.org.uk>
Acked-by: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/atm/Kconfig b/drivers/atm/Kconfig
index 5b4fab2..bb4ae62 100644
--- a/drivers/atm/Kconfig
+++ b/drivers/atm/Kconfig
@@ -142,7 +142,7 @@
 
 config ATM_FIRESTREAM
 	tristate "Fujitsu FireStream (FS50/FS155) "
-	depends on PCI
+	depends on PCI && VIRT_TO_BUS
 	help
 	  Driver for the Fujitsu FireStream 155 (MB86697) and
 	  FireStream 50 (MB86695) ATM PCI chips.
@@ -152,7 +152,7 @@
 
 config ATM_ZATM
 	tristate "ZeitNet ZN1221/ZN1225"
-	depends on PCI
+	depends on PCI && VIRT_TO_BUS
 	help
 	  Driver for the ZeitNet ZN1221 (MMF) and ZN1225 (UTP-5) 155 Mbps ATM
 	  adapters.
@@ -240,7 +240,7 @@
 
 config ATM_AMBASSADOR
 	tristate "Madge Ambassador (Collage PCI 155 Server)"
-	depends on PCI
+	depends on PCI && VIRT_TO_BUS
 	select BITREVERSE
 	help
 	  This is a driver for ATMizer based ATM card produced by Madge
@@ -265,7 +265,7 @@
 
 config ATM_HORIZON
 	tristate "Madge Horizon [Ultra] (Collage PCI 25 and Collage PCI 155 Client)"
-	depends on PCI
+	depends on PCI && VIRT_TO_BUS
 	help
 	  This is a driver for the Horizon chipset ATM adapter cards once
 	  produced by Madge Networks Ltd. Say Y (or M to compile as a module