When entering the kernel with the MMU off assume we are running from a
va == pa map.

I'm not sure the code would work if we are not running from the identity
map as the ARM core may attempt to read the next instruction from an
invalid memory location.


git-svn-id: svn+ssh://svn.freebsd.org/base/head@271240 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f