Bug#864807: debian-installer: Lamobo R1 requires modprobe b53_mdio

[Heinrich Schuchardt <xypron.glpk@gmx.de>]

Package: debian-installer
Version: stretch
Severity: normal

Dear Maintainer,

the Lamobo R1 is an Arm system based on the Amlogic A20.
The network interface of the A20 is connected to a switch.
If the switch is not configured there is no external
network access and subsequently a network install fails.

On an installed system it is sufficient to have a line
in /etc/modules:
b53_mdio

I suggest the following corrections to the installer:

The initrd.img should include the b53_mdio module and its
prerequisites b53_common and dsa_core plus aforementioned
file /etc/modules.

The installer should compare the content of
/proc/device-tree/model
to the string
Lamobo R1

If this string is found, the file /etc/modules should be
appended with b53_mdio on the installed system.

Best regards

Heinrich Schuchardt