Pull up following revision(s) (requested by gutteridge in ticket #249):

distrib/evbmips/instkernel/ramdisk/Makefile: revision 1.16
distrib/evbmips/instkernel/ramdisk/Makefile: revision 1.17
distrib/evbmips/instkernel/ramdisk/Makefile: revision 1.18
distrib/evbmips/instkernel/ramdisk/list: revision 1.19

Add bpf to the device nodes provided in the evbmips ramdisk

Intended to address an issue noted by Denis Ovsienko on port-mips,
where dhcpcd doesn't work with the netbsd-INSTALL_OCTEON kernel. (I am
not able to test this directly, but verified by mounting the ramdisk
images generated before and after this change.)

Remove redundant variable assignment
It got clobbered by another assignment later, and this has been the
case since r. 1.1 of the file.

Add dk[0-3] to the device nodes provided in the evbmips ramdisk
The installer provided by octeon.img creates wedges, which may later
need to be recovered via the standard sysinst installer provided by
netbsd-INSTALL_OCTEON.

Add dkctl(8) and gpt(8) to the evbmips ramdisk

The installer provided by octeon.img creates GPT wedges, which may
later need to be recovered via the standard sysinst installer provided
by netbsd-INSTALL_OCTEON.

(martin)