mvebu: migrate mamba support to the upstreamed code

package/boot/uboot-envtools/files/mvebu

target/linux/mvebu/base-files/etc/diag.sh

target/linux/mvebu/base-files/etc/uci-defaults/01_leds

target/linux/mvebu/base-files/etc/uci-defaults/02_network

target/linux/mvebu/base-files/etc/uci-defaults/03_wireless

target/linux/mvebu/base-files/lib/mvebu.sh

target/linux/mvebu/base-files/lib/preinit/06_set_iface_mac

target/linux/mvebu/base-files/lib/preinit/81_linksys_syscfg

target/linux/mvebu/base-files/lib/upgrade/platform.sh

...t/linux/mvebu/files/arch/arm/boot/dts/armada-xp-mamba.dts

target/linux/mvebu/image/Makefile

target/linux/mvebu/patches-3.18/001-add_mamba_support.patch

target/linux/mvebu/patches-3.18/001-build_mamba_dts.patch

.../linux/mvebu/patches-3.18/002-add_mamba_powertables.patch

target/linux/mvebu/patches-3.18/003-add_mamba_switch.patch

target/linux/mvebu/patches-4.0/001-add_mamba_support.patch

target/linux/mvebu/patches-4.0/001-build_mamba_dts.patch

...t/linux/mvebu/patches-4.0/002-add_mamba_powertables.patch

target/linux/mvebu/patches-4.0/003-add_mamba_switch.patch