netdev: expose net_device_ops compat as config option

Now that most network device drivers in (all but one in x86_64 allmodconfig)
support net_device_ops. Expose it as a configuration parameter. Still
need to address even older 32 bit drivers, and other arch before
compatiablity can be scheduled for removal in some future release.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/Kconfig

@@ -26,6 +26,15 @@ menuconfig NETDEVICES
 # that for each of the symbols.
 if NETDEVICES
 
+config COMPAT_NET_DEV_OPS
+       default y
+       bool "Enable older network device API compatiablity"
+       ---help---
+          This option enables kernel compatiability with older network devices
+          that do not use net_device_ops interface.
+
+	  If unsure, say Y.
+
 config IFB
 	tristate "Intermediate Functional Block support"
 	depends on NET_CLS_ACT

net/Kconfig

@@ -24,9 +24,6 @@ if NET
 
 menu "Networking options"
 
-config COMPAT_NET_DEV_OPS
-       def_bool y
-
 source "net/packet/Kconfig"
 source "net/unix/Kconfig"
 source "net/xfrm/Kconfig"