can: Kconfig: convert 'depends on CAN' into 'if CAN...endif' block

This patch adds an 'if CAN...endif' Block around all CAN symbols in
net/can/Kconfig. So the 'depends on CAN' dependencies can be removed.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

net/can/Kconfig

@@ -16,9 +16,10 @@ menuconfig CAN
 	  If you want CAN support you should say Y here and also to the
 	  specific driver for your controller(s) below.
 
+if CAN
+
 config CAN_RAW
 	tristate "Raw CAN Protocol (raw access with CAN-ID filtering)"
-	depends on CAN
 	default N
 	---help---
 	  The raw CAN protocol option offers access to the CAN bus via
@@ -29,7 +30,6 @@ config CAN_RAW
 
 config CAN_BCM
 	tristate "Broadcast Manager CAN Protocol (with content filtering)"
-	depends on CAN
 	default N
 	---help---
 	  The Broadcast Manager offers content filtering, timeout monitoring,
@@ -42,7 +42,6 @@ config CAN_BCM
 
 config CAN_GW
 	tristate "CAN Gateway/Router (with netlink configuration)"
-	depends on CAN
 	default N
 	---help---
 	  The CAN Gateway/Router is used to route (and modify) CAN frames.
@@ -53,3 +52,5 @@ config CAN_GW
 	  by the netlink configuration interface known e.g. from iptables.
 
 source "drivers/net/can/Kconfig"
+
+endif