ecfxp: fix max packet size
ecfxp: fix max packet size

rlei/fastd-android,rlei/fastd-android,fpletz/fastd,fpletz/fastd,rlei/fastd-android,fpletz/fastd,rlei/fastd-android,fpletz/fastd,fpletz/fastd,rlei/fastd-android