[PATCH v1] maintainers: update for testpmd

[Thomas Monjalon]

> >> Add Yuying Zhang as a co-maintainer.
> >>
> >> Signed-off-by: Yuying Zhang <yuying.zhang at intel.com>
> > 
> > Acked-by: Xiaoyun Li <xiaoyun.li at intel.com>
> > 
> 
> Acked-by: Ferruh Yigit <ferruh.yigit at intel.com>
> 
> > Thanks for the volunteer.
> 
> +1

Applied, thanks for volunteering,
we need more maintainers for testpmd.
I think there is room for one more, with different ideas,
ideally outside of Intel.