K 10
svn:author
V 3
imp
K 8
svn:date
V 27
2020-02-02T08:27:14.840581Z
K 7
svn:log
V 162
Kill old armv4 busdma

Move to having one busdma option for arm: the armv6/v7 one.
Kill now-unused option ARM_USE_V6_BUSDMA too.
Fixup files.arm to match rename.

END