NetBSD and pinebook keyboard/trackpad firmware updater

[Jeremiah Cornelius]

this post is to document the minor differences to run and
install the pinebookpro trackpad/keyboard firmware update
while running netbsd.

please see the original post for details about the issue:
  https://forum.pine64.org/announcements.php?aid=23


for me i had to do this beyond the normal instructions:

- install libusb1 from pkgsrc
- install vim-share from pkgsrc (this provides xxd)
- patch the Makefile to use these cflags:
      -I/usr/pkg/include -R/usr/pkg/lib -L/usr/pkg/lib
- use gmake not make

and i had to power-cycle between step-1 and step-2.

Thanks for this. It's very helpful.