odhcp6c: update to Git HEAD (2025-11-14)

odhcp6c: update to Git HEAD (2025-11-14)

cbc8ff0e6226 github: ci: add powerpc arch
8eba02233133 github: ci: add cmake build and source directories
5f3104ea17ae github: ci: disable json-c tests
27ff42cd40f9 scripts: devel-build: disable json-c tests
e0a9d02b52d1 dhcpv6: DHCPV6_OPT_INFO_REFRESH contains a 4 byte option
5a02da9c1200 dhcpv6: use compile time resolved sizeof(struct in6_addr) for IPv6 values
cf203ceb3fc8 dhcpv6: set a static define for DUID max length
3627e85d1540 dhcpv6: set static defines for DHCPv6 option header size
ecb9a0243e77 odhcp6c: RFC comments
c284c587d37d all: spell fixes
1259a32d7e4d dhcpv6: dhcpv6_handle_reply switch case handling
227280a37853 dhcpv6: dhcpv6_handle_advert; migrate if blocks to switch case
b253f8907e72 dhcpv6: migrate to switch case for dhcpv6_handle_reply
61a54db802cb dhcpv6: migrate to switch case for dhcpv6_handle_reply
49c64bbe00ba all: drop CER_ID
16ce83075b2e dhcpv6: refactor u8 and u16 to u32 to avoid boolean coercion

https://github.com/openwrt/odhcp6c/compare/e5690c1f13ed...cbc8ff0e6226

Options related to homenet (EXT_CER_ID) have been removed, so drop them from
the package.

Signed-off-by: Álvaro Fernández Rojas <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/20791