`MODULE_GNRC_DHCPV6_CLIENT_IA_PD` does not exist, the correct module name is `MODULE_DHCPV6_CLIENT_IA_PD`.
This changes the prefixes of the symbols generated from USEMODULE and USEPKG variables. The changes are as follow: KCONFIG_MODULE_ => KCONFIG_USEMODULE_ KCONFIG_PKG_ => KCONFIG_USEPKG_ MODULE_ => USEMODULE_ PKG_ => USEPKG_