Use menuconfig objects: ISDN: CONFIG_ISDN

Transform Kconfig objects from "menu, config" into "menuconfig" so that the
user can disable the whole feature without having to enter the menu first.

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Cc: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/isdn/Kconfig b/drivers/isdn/Kconfig
index 3e088c4..a3c9a0343 100644
--- a/drivers/isdn/Kconfig
+++ b/drivers/isdn/Kconfig
@@ -2,12 +2,10 @@
 # ISDN device configuration
 #
 
-menu "ISDN subsystem"
-	depends on !S390
-
-config ISDN
+menuconfig ISDN
 	tristate "ISDN support"
 	depends on NET
+	depends on !S390
 	---help---
 	  ISDN ("Integrated Services Digital Networks", called RNIS in France)
 	  is a special type of fully digital telephone service; it's mostly
@@ -21,9 +19,9 @@
 
 	  Select this option if you want your kernel to support ISDN.
 
+if ISDN
 
 menu "Old ISDN4Linux"
-	depends on NET && ISDN
 
 config ISDN_I4L
 	tristate "Old ISDN4Linux (deprecated)"
@@ -50,11 +48,9 @@
 endmenu
 
 comment "CAPI subsystem"
-	depends on NET && ISDN
 
 config ISDN_CAPI
 	tristate "CAPI2.0 support"
-	depends on ISDN
 	help
 	  This provides the CAPI (Common ISDN Application Programming
 	  Interface, a standard making it easy for programs to access ISDN
@@ -65,5 +61,4 @@
 
 source "drivers/isdn/hardware/Kconfig"
 
-endmenu
-
+endif # ISDN