git: emx: Free tx mbufs proactively.

[Sepherosa Ziehau]

commit fec2831623729f5759524359bacdce108e049755
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Mon Oct 30 13:54:56 2017 +0800

    emx: Free tx mbufs proactively.
    
    This is preparation for the dillon's upcoming sendfile patch.

Summary of changes:
 sys/dev/netif/emx/if_emx.c | 160 +++++++++++++++++++++++++++++++++------------
 sys/dev/netif/emx/if_emx.h |   8 ++-
 2 files changed, 127 insertions(+), 41 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/fec2831623729f5759524359bacdce108e049755


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