port-arm/53284: Support RPI3B+,RPI0W,RPI2-1.2

[jun%soum.co.jp@localhost]

>Number:         53284
>Category:       port-arm
>Synopsis:       Support RPI3B+,RPI0W,RPI2-1.2
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    port-arm-maintainer
>State:          open
>Class:          support
>Submitter-Id:   net
>Arrival-Date:   Sun May 13 05:30:00 +0000 2018
>Originator:     Jun Ebihara
>Release:        NetBSD rpi 8.99.14
>Organization:
SOUM Corporation
>Environment:
NetBSD rpi 8.99.14 NetBSD 8.99.14 (RPI2) #0: Wed Mar 21 17:03:09 UTC 2018  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/evbarm/compile/RPI2 evbarm
>Description:
RPI3B+
RPI0W
RPI2-1.2
need dtb files to boot NetBSD. 

on default,boot failed on RPI3B+ RPI0W RPI2-1.2.

>How-To-Repeat:
make netbsd rpi image
http://nycdn.netbsd.org/pub/NetBSD-daily/HEAD/201805121530Z/evbarm-earmv6hf/binary/gzimg/rpi.img.gz

gunzip < rpi.img.gz |dd of=/dev/rsd0d

boot failed with 
RPI3B+
RPI0W
RPI2-1.2

>Fix:
copy or make dtb files to boot.
        # RPI3B+
        cp ${MNT}/bcm2837-rpi-3-b.dtb  ${MNT}/bcm2837-rpi-3-b-plus.dtb
        # RPI0W
        cp ${MNT}/bcm2835-rpi-zero.dtb ${MNT}/bcm2835-rpi-zero-w.dtb
        # RPI2-1.2
        cp ${MNT}/bcm2836-rpi-2-b.dtb  ${MNT}/bcm2837-rpi-2-b.dtb

http://ftp.netbsd.org/pub/NetBSD/misc/jun/raspberry-pi/2018-04-14-earmv6hf/2018-04-14-netbsd-raspi-earmv6hf.img.gz
gunzip < 2018-04-14-netbsd-raspi-earmv6hf.img.gz |dd of=/dev/rsd0d

boot well on 
RPI3B+
RPI0W
RPI2-1.2