[openwrt/openwrt] kernel: make lwtunnel support optional

[LEDE Commits]

aparcar pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/412dc26c99beeeeace3e56321fc392e590f4144d

commit 412dc26c99beeeeace3e56321fc392e590f4144d
Author: Rui Salvaterra <rsalvaterra at gmail.com>
AuthorDate: Thu Jan 14 15:24:58 2021 +0000

    kernel: make lwtunnel support optional
    
    Not everyone will want to bloat their kernel by 24 kiB for such a niche
    feature.
    
    Fixes: a1a7f3274e0ed27511d45f62ee20281d8d57c7af "kernel: enable SRv6 support by
    enabling lwtunnel"
    
    Signed-off-by: Rui Salvaterra <rsalvaterra at gmail.com>
---
 config/Config-kernel.in | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index d99ce44c0d..8a78e297cb 100644
--- a/config/Config-kernel.in
+++ b/config/Config-kernel.in
@@ -975,9 +975,10 @@ if KERNEL_IPV6
 		def_bool n
 
 	config KERNEL_IPV6_SEG6_LWTUNNEL
-		def_bool y if !SMALL_FLASH
+		bool "Enable support for lightweight tunnels"
+		default y if !SMALL_FLASH
 		help
-		  Using lwtunnel requires full-ip package.
+		  Using lwtunnel (needed for IPv6 segment routing) requires ip-full package.
 
 	config KERNEL_LWTUNNEL_BPF
 		def_bool n