Fix the Enhanced Compilation Failure Issue

[lec-bit]

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[hzxuzhonghu]

Thanks @lec-bit

/lgtm

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[bfforever]

kmesh/pkg/bpf/bpf_kmesh.go

Line 83 in 92ec791

func NewBpfKmesh(cfg *options.BpfConfig) (BpfKmesh, error) {

kmesh/pkg/bpf/bpf_kmesh.go

Line 86 in 92ec791

sc := BpfKmesh{}

Maybe above two place need to change Bpfmesh to reference type to fix enhanced complilation failure.

[hzxuzhonghu]

In theory this is better to return pointer type in case there is some copy and we mutate the original object later . @lec-bit @bfforever Did you test the features with this patch, i canot see where we copy it

[bfforever]

My development machine is enhanced kernel, go build would build with bpf_kmesh.go file, not bpf_kmesh_l4.go file, so would report a inconsistent type error at compile time.