[PATCH] Cleanup SLHC configuration

Convert selection of serial line header compression to use CONFIG_SLHC
rather than makefile ifeq uglyness.  This makes it easier to select
the SLHC module from other code.
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/isdn/i4l/Kconfig

@@ -5,6 +5,7 @@
 config ISDN_PPP
 	bool "Support synchronous PPP"
 	depends on INET
+	select SLHC
 	help
 	  Over digital connections such as ISDN, there is no need to
 	  synchronize sender and recipient's clocks with start and stop bits

drivers/net/Kconfig

@@ -2509,6 +2509,7 @@ config PLIP
 
 config PPP
 	tristate "PPP (point-to-point protocol) support"
+	select SLHC
 	---help---
 	  PPP (Point to Point Protocol) is a newer and better SLIP.  It serves
 	  the same purpose: sending Internet traffic over telephone (and other
@@ -2689,6 +2690,7 @@ config SLIP
 config SLIP_COMPRESSED
 	bool "CSLIP compressed headers"
 	depends on SLIP
+	select SLHC
 	---help---
 	  This protocol is faster than SLIP because it uses compression on the
 	  TCP/IP headers (not on the data itself), but it has to be supported
@@ -2701,6 +2703,12 @@ config SLIP_COMPRESSED
 	  <http://www.tldp.org/docs.html#howto>, explains how to configure
 	  CSLIP. This won't enlarge your kernel.
 
+config SLHC
+	tristate
+	help
+	  This option enables Van Jacobsen serial line header compression
+	  routines.
+
 config SLIP_SMART
 	bool "Keepalive and linefill"
 	depends on SLIP

drivers/net/Makefile

@@ -2,10 +2,6 @@
 # Makefile for the Linux network (ethercard) device drivers.
 #
 
-ifeq ($(CONFIG_ISDN_PPP),y)
-  obj-$(CONFIG_ISDN) += slhc.o
-endif
-
 obj-$(CONFIG_E1000) += e1000/
 obj-$(CONFIG_IBM_EMAC) += ibm_emac/
 obj-$(CONFIG_IXGB) += ixgb/
@@ -111,7 +107,7 @@ obj-$(CONFIG_NE_H8300) += ne-h8300.o 8390.o
 
 obj-$(CONFIG_MV643XX_ETH) += mv643xx_eth.o
 
-obj-$(CONFIG_PPP) += ppp_generic.o slhc.o
+obj-$(CONFIG_PPP) += ppp_generic.o
 obj-$(CONFIG_PPP_ASYNC) += ppp_async.o
 obj-$(CONFIG_PPP_SYNC_TTY) += ppp_synctty.o
 obj-$(CONFIG_PPP_DEFLATE) += ppp_deflate.o
@@ -120,9 +116,7 @@ obj-$(CONFIG_PPP_MPPE) += ppp_mppe.o
 obj-$(CONFIG_PPPOE) += pppox.o pppoe.o
 
 obj-$(CONFIG_SLIP) += slip.o
-ifeq ($(CONFIG_SLIP_COMPRESSED),y)
-  obj-$(CONFIG_SLIP) += slhc.o
-endif
+obj-$(CONFIG_SLHC) += slhc.o
 
 obj-$(CONFIG_DUMMY) += dummy.o
 obj-$(CONFIG_IFB) += ifb.o