mipsel-bfk3: Initial take on bfk3 support

features.in/mipsel-bfk3/config.mk

+use/mipsel-bfk3: use/kernel
+	@$(call add_feature)
+	@$(call set,KFLAVOURS,bfk3-def)
+	@$(call set,VM_FSTYPE,ext2)
+	@$(call add,NET_ETH,eth0:dhcp)
+	@$(call add,NET_ETH,eth1:dhcp)
+	@$(call add,NET_ETH,eth2:dhcp)

features.in/mipsel-bfk3/rootfs/image-scripts.d/10-initd-config

+#!/bin/sh
+
+echo 'MODULES_PRELOAD += ext2' >> /etc/initrd.mk

features.in/mipsel-bfk3/rootfs/image-scripts.d/40-boot

+#!/bin/sh -efu
+
+mkdir -p /boot
+
+vmlinuz="$(find /boot -type f -name 'vmlinuz-*')"
+kversion="${vmlinuz##/boot/vmlinuz-}"
+
+DTB_NAME=baikal_bfk2
+
+[ -n "$DTB_NAME" ]
+
+cp /lib/devicetree/"$kversion/$DTB_NAME".dtb /boot/"$DTB_NAME"-"$kversion".dtb
+ln -s "$DTB_NAME"-"$kversion".dtb /boot/$DTB_NAME.dtb
+
+ln -s boot/vmlinuz /vmlinux.bin
+ln -s boot/initrd.img /initramfs.gz
+ln -s boot/"$DTB_NAME".dtb /baikal.dtb
+
+ln -s boot/vmlinuz /bfk3.vmlinux.bin
+
+# to match update-kernel
+mkdir -p /boot/dtb
+ln -s /boot/"$DTB_NAME"-"$kversion".dtb /boot/dtb/"$DTB_NAME".dtb
+ln -s /boot/dtb/"$DTB_NAME".dtb /bfk3.dtb
+
+exit 0