Intel NUC support (#288)

* Add hassos configuration for intel-nuc:

 * Cloned from ova config
 * Use default amd64 kernel config
 * Add support for Intel IGB type nics
 * Add rng-tools for better random

* Build with iwlwifi module & firmware (only newer modules with iwlmvm firmware)

* Include firmware for 915, which should improve power efficiency.
Build display and audio as a module to make it all work.

* Add intel_nuc to build script.

* Change directory structure as proposed by @pvizeli

*  * Fix paths
 * Remove unused patch directory

* Unduplicate barebox config.

buildroot-external/board/intel/nuc/hassos-hook.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+# shellcheck disable=SC2155
+
+function hassos_pre_image() {
+    local BOOT_DATA="$(path_boot_dir)"
+
+    mkdir -p "${BOOT_DATA}/EFI/BOOT"
+    mkdir -p "${BOOT_DATA}/EFI/barebox"
+
+    cp "${BINARIES_DIR}/barebox.bin" "${BOOT_DATA}/EFI/BOOT/BOOTx64.EFI"
+    cp "${BR2_EXTERNAL_HASSOS_PATH}/misc/barebox-state-efi.dtb" "${BOOT_DATA}/EFI/barebox/state.dtb"
+
+    echo "console=tty1" > "${BOOT_DATA}/cmdline.txt"
+}
+
+
+function hassos_post_image() {
+    convert_disk_image_gz
+}
+

buildroot-external/board/intel/nuc/kernel.config

@@ -0,0 +1,21 @@
+CONFIG_EFI_STUB=y
+
+CONFIG_SCSI_LOWLEVEL=y
+CONFIG_USB_XHCI_HCD=y
+
+CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
+
+CONFIG_IGB=y
+
+CONFIG_IWLWIFI=m
+CONFIG_IWLMVM=m
+
+CONFIG_DRM_I915=m
+CONFIG_DRM_I915_CAPTURE_ERROR=y
+CONFIG_DRM_I915_COMPRESS_ERROR=y
+CONFIG_DRM_I915_USERPTR=y
+
+CONFIG_SND_HDA=m
+CONFIG_SND_HDA_INTEL=m
+CONFIG_SND_HDA_I915=y
+CONFIG_SND_HDA_POWER_SAVE_DEFAULT=1

buildroot-external/board/intel/nuc/meta

@@ -0,0 +1,7 @@
+BOARD_ID=intel-nuc
+BOARD_NAME="Intel NUC"
+CHASSIS=embedded
+BOOTLOADER=barebox
+KERNEL_FILE=bzImage
+BOOT_SYS=efi
+DISK_SIZE=6