net: Allow dependancies of FDDI & Tokenring to be modular.

I noticed it isn't possible to build token ring & fddi drivers
without causing LLC, and a bunch of other things to be forced
built-in.  For distro kernels, this means carrying a chunk of
code in the vmlinuz, even if the user doesn't use those protocols.

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index adb4073..72a9212 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2650,7 +2650,7 @@
 	default "128"
 
 config FDDI
-	bool "FDDI driver support"
+	tristate "FDDI driver support"
 	depends on (PCI || EISA || TC)
 	help
 	  Fiber Distributed Data Interface is a high speed local area network