Without this patch, a single initialization function was
used to initialize both the vnet'd and non-vnet'd data.
This patch separates out the non-vnet'd initializations
into a separate function invoked by SYSINIT().
This avoids use of IS_DEFAULT_VNET() in the initialization
functions and also configures the non-vnet'd initialization
function to be called first, although ordering is not
currently needed.
Reviewed by: glebius
MFC after: 3 months
Differential Revision: https://reviews.freebsd.org/D38749
57ff348804