r 293304: BROKEN: buildkernel fails due to error: error: no member named 't_maxopd' in 'struct tcpcb'

Recent r293304 fails to build kernel due to the error below:

[...]
--- kern_testfrwk.o ---
cc  -O2 -pipe -O3 -O3 -pipe -march=native  -fno-strict-aliasing -Werror
-D_KERNEL -DKLD_MODULE -nostdinc   -DHAVE_KERNEL_OPTION_HEADERS
-include /usr/obj/usr/src/sys/FREYJA/opt_global.h -I. -I/usr/src/sys
-fno-common  -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
-I/usr/obj/usr/src/sys/FREYJA  -mcmodel=kernel -mno-red-zone -mno-mmx -mno-sse
-msoft-float  -fno-asynchronous-unwind-tables -ffreestanding -fwrapv
-fstack-protector -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes
-Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual  -Wundef
-Wno-pointer-sign -D__printf__=__freebsd_kprintf__  -Wmissing-include-dirs
-fdiagnostics-show-option  -Wno-unknown-pragmas
-Wno-error-tautological-compare -Wno-error-empty-body
-Wno-error-parentheses-equality -Wno-error-unused-function
-Wno-error-pointer-sign -Wno-error-shift-negative-value  -mno-aes -mno-avx
-std=iso9899:1999
-c /usr/src/sys/modules/tests/framework/../../../tests/framework/kern_testfrwk.c
-o kern_testfrwk.o --- all_subdir_tcp/fastpath
--- /usr/src/sys/modules/tcp/fastpath/../../../netinet/tcp_stacks/fastpath.c:481:6:
error: no member named 't_maxopd' in 'struct tcpcb' if (DELAY_ACK(tp, tlen))
{ ^
~~ /usr/src/sys/modules/tcp/fastpath/../../../netinet/tcp_stacks/fastpath.c:167:19:
note: expanded from macro 'DELAY_ACK' (tlen <= tp->t_maxopd)
&&                                   \
^ /usr/src/sys/modules/tcp/fastpath/../../../netinet/tcp_stacks/fastpath.c:606:8:
error: no member named 't_maxopd' in 'struct tcpcb' if (DELAY_ACK(tp, tlen) &&
tlen != 0) ^
~~ /usr/src/sys/modules/tcp/fastpath/../../../netinet/tcp_stacks/fastpath.c:167:19:
note: expanded from macro 'DELAY_ACK' (tlen <= tp->t_maxopd)
&&                                   \ ^ --- sctp_indata.o --- ctfconvert -L
VERSION sctp_indata.o ERROR: ctfconvert: sctp_indata.o doesn't have type data
to convert --- modules-all --- --- all_subdir_sfxge --- --- siena_vpd.o --- cc
-O2 -pipe -O3 -O3 -pipe -march=native  -fno-strict-aliasing -Werror -D_KERNEL
-DKLD_MODULE -nostdinc   -DHAVE_KERNEL_OPTION_HEADERS
-include /usr/obj/usr/src/sys/FREYJA/opt_global.h -I. -I/usr/src/sys
-fno-common  -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
-I/usr/obj/usr/src/sys/FREYJA  -mcmodel=kernel -mno-red-zone -mno-mmx -mno-sse
-msoft-float  -fno-asynchronous-unwind-tables -ffreestanding -fwrapv
-fstack-protector -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes
-Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual  -Wundef
-Wno-pointer-sign -D__printf__=__freebsd_kprintf__  -Wmissing-include-dirs
-fdiagnostics-show-option  -Wno-unknown-pragmas
-Wno-error-tautological-compare -Wno-error-empty-body
-Wno-error-parentheses-equality -Wno-error-unused-function
-Wno-error-pointer-sign -Wno-error-shift-negative-value  -mno-aes -mno-avx
-std=iso9899:1999
-c /usr/src/sys/modules/sfxge/../../dev/sfxge/common/siena_vpd.c -o siena_vpd.o
--- all_subdir_tcp/fastpath
--- /usr/src/sys/modules/tcp/fastpath/../../../netinet/tcp_stacks/fastpath.c:1545:8:
error: no member named 't_maxopd' in 'struct tcpcb' if (DELAY_ACK(tp, tlen))
^
~~ /usr/src/sys/modules/tcp/fastpath/../../../netinet/tcp_stacks/fastpath.c:167:19:
note: expanded from macro 'DELAY_ACK' (tlen <= tp->t_maxopd)
&&                                   \ ^ 3 errors generated. *** [fastpath.o]
Error code 1

make[4]: stopped in /usr/src/sys/modules/tcp/fastpath
1 error

make[4]: stopped in /usr/src/sys/modules/tcp/fastpath
*** [all_subdir_tcp/fastpath] Error code 2

make[3]: stopped in /usr/src/sys/modules
--- all_subdir_sfxge ---
--- siena_sram.o ---
ctfconvert -L VERSION siena_sram.o
ERROR: ctfconvert: siena_sram.o doesn't have type data to convert
--- all_subdir_tests/callout_test ---
ctfconvert -L VERSION callout_test.o
ERROR: ctfconvert: callout_test.o doesn't have type data to convert
A failure has been detected in another branch of the parallel make

make[4]: stopped in /usr/src/sys/modules/tests/callout_test
*** [all_subdir_tests/callout_test] Error code 2

make[3]: stopped in /usr/src/sys/modules
--- sctp_input.o ---
ctfconvert -L VERSION sctp_input.o