K 10
svn:author
V 6
rlibby
K 8
svn:date
V 27
2019-12-03T17:43:52.846340Z
K 7
svn:log
V 389
mips busdma: bzero map on alloc

Maps from the mips busdma dmamap_zone were not completely initialized.
In particular, pagesneeded and pagesreserved were not initialized.  This
could cause a crash.

Remove some dead fields from mips struct bus_dmamap while here.

Reported by:	brooks
Reviewed by:	ian
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D22638

END