tc-basic-classifier: fix tcp port Endianess bug by AI

AI generated class_filter program stored the tcp port in network order,
but in bpf program the tcp port is converted to host order, and result in
tcp port lookup failure, unable to get the correct classid, fail to do rate
classification.

Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# Date:      Mon Oct 20 21:28:17 2025 -0700
#
# interactive rebase in progress; onto a18fe4b
# Last commands done (2 commands done):
#    pick 615e951 tc-basic-classifier: fix tcp port Endianess bug by AI
#    squash 7d87024 handle system call ret
# No commands remaining.
# You are currently rebasing branch 'main' on 'a18fe4b'.
#
# Changes to be committed:
#	modified:   tc-basic-classifier/class_filter.bpf.c
#	modified:   tc-basic-classifier/class_filter.c
#
# Untracked files:
#	lib/libxdp/#libxdp.3#
#	lib/libxdp/.#libxdp.3
#	lib/libxdp/libxdp.man~
#	tc-basic-classifier/class_filter.c.new
#	tc-syncookie/
#	xdp-bench/xdp-bench.8~
#	xdp-filter/xdp-filter.8~
#	xdp-forward/xdp-forward.8~
#	xdp-loader/xdp-loader.8~
#	xdp-monitor/xdp-monitor.8~
#	xdp-trafficgen/xdp-trafficgen.8~
#
