http://mail-index.netbsd.org/tech-userlevel/2011/08/25/msg005404.html
This is used by disk tools such as disklabel(8) to dynamically decide is
the undelyling platform uses a disklabel-in-mbr-partition or not
(instead of using a compile-time list of ports).
getlabelusesmbr() reads the sysctl kern.labelusesmbr, takes its value from the
machdep #define LABELUSESMBR.
For evbmips, make LABELUSESMBR 1 if the platform uses pmon
as bootloader, and 0 (the previous value) otherwise.
for NEC's MIPS based EWS4800 workstations.
Most porting work was done by UCHIYAMA Yasushi <uch@netbsd>
http://mail-index.netbsd.org/port-mips/2004/06/27/0000.html
and various cleanup, updating, and fixes have been done by me.
Currently only EWS4800/350, 360, 360AD, 360ADII, 360EX and 360SX
models are supported.
