iwm: use m_collapse() to defragment a mbuf chain
- Simplify defragmentation code.
- Use proper number of dma segments for data.
Approved by: adrian (mentor)
Obtained from: DragonFlyBSD (mostly)
Differential Revision: https://reviews.freebsd.org/D4754
iwm: use m_collapse() to defragment a mbuf chain Tags None Referenced Files None Subscribers None
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