Kconfig: add generated Kconfig_vlans.in for VLANs

Keep all VLAN related configuration in the Kconfig_vlans.in.
Source this file in the Kconfig
Also copy it to the target.
Kconfig_vlans.in is generated by a command:
userspace/host_tools/gen_vlan_kconf.sh > Kconfig_vlans.in

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Kconfig

@@ -858,3 +858,4 @@ config FAN_HYSTERESIS_PWM_VAL
 endmenu
 
 endmenu
+source Kconfig_vlans.in

userspace/dot-config/.gitignore

 Kconfig
+Kconfig_vlans.in
 dot-config
 conf
 mconf

userspace/dot-config/Makefile

@@ -15,7 +15,7 @@ OBJDUMP         = $(CROSS_COMPILE)objdump
 CFLAGS =  -D KBUILD_NO_NLS
 
 # most of this is just copying stuff in
-RFILES = Kconfig dot-config wrs_release_defconfig
+RFILES = Kconfig Kconfig_vlans.in dot-config wrs_release_defconfig
 XFILES = conf mconf nconf
 FILES = $(RFILES) $(XFILES)