l2tp: Relocate pppol2tp driver to new net/l2tp directory

This patch moves the existing pppol2tp driver from drivers/net into a
new net/l2tp directory, which is where the upcoming L2TPv3 code will
live. The existing CONFIG_PPPOL2TP config option is left in its
current place to avoid "make oldconfig" issues when an existing
pppol2tp user takes this change. (This is the same approach used for
the pppoatm driver, which moved to net/atm.)

There are no code changes. The existing drivers/net/pppol2tp.c is
simply moved to net/l2tp.

Signed-off-by: James Chapman <jchapman@katalix.com>
Reviewed-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index ba06c1c..f8444f4 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -160,7 +160,7 @@
 obj-$(CONFIG_PPP_BSDCOMP) += bsd_comp.o
 obj-$(CONFIG_PPP_MPPE) += ppp_mppe.o
 obj-$(CONFIG_PPPOE) += pppox.o pppoe.o
-obj-$(CONFIG_PPPOL2TP) += pppox.o pppol2tp.o
+obj-$(CONFIG_PPPOL2TP) += pppox.o
 
 obj-$(CONFIG_SLIP) += slip.o
 obj-$(CONFIG_SLHC) += slhc.o
diff --git a/net/Makefile b/net/Makefile
index a5eae27..13ca77e 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -40,6 +40,7 @@
 obj-$(CONFIG_SUNRPC)		+= sunrpc/
 obj-$(CONFIG_AF_RXRPC)		+= rxrpc/
 obj-$(CONFIG_ATM)		+= atm/
+obj-$(CONFIG_PPPOL2TP)		+= l2tp/
 obj-$(CONFIG_DECNET)		+= decnet/
 obj-$(CONFIG_ECONET)		+= econet/
 obj-$(CONFIG_PHONET)		+= phonet/
diff --git a/net/l2tp/Makefile b/net/l2tp/Makefile
new file mode 100644
index 0000000..9af41e8
--- /dev/null
+++ b/net/l2tp/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the L2TP.
+#
+
+obj-$(CONFIG_PPPOL2TP) += pppol2tp.o
diff --git a/drivers/net/pppol2tp.c b/net/l2tp/pppol2tp.c
similarity index 100%
rename from drivers/net/pppol2tp.c
rename to net/l2tp/pppol2tp.c