Draft: Add md-modules to arm64 cdrom builds
U-Boot is adding support for HTTP(s) boot. The installation media is made available as a /dev/pmem device: in order for the installer to be able to mount it, we need to have pmem modules in the installer initrd.
This is one of the MRs needed to support U-Boot HTTP(s) boot, the other two being:
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[arm64] Add {of,nd}_pmem to arm64 md-modules udeb kernel-team/linux!1167
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Add /dev/pmem devices to list-devices-linux in debian-installer-utils (TBD)
See https://www.linaro.org/blog/ledge-blogs-uefi-http-and-https-boot-in-u-boot/