K 10
svn:author
V 6
andrew
K 8
svn:date
V 27
2020-08-03T16:26:10.897991Z
K 7
svn:log
V 474
Allow child classes of simplebus to call attach directly

Reduce code duplication when a bus is subclassed from simplebus by allowing
them to call simplebus_attach directly. This is useful when the child bus
will just implement the same calls.

As not all children will expect to have a ranges property, e.g. the
Raspberry Pi firmware, allow this property to be missing.

Reviewed by:	manu
Sponsored by:	Innovate UK
Differential Revision:	https://reviews.freebsd.org/D25925

END