Add support for NanoPi R3S (#7556)

* add nanopi-r3s.csc board config

* Nanopi R3S - add uboot patch

* Nanopi R3S - add dts

* fix bogus patch header

* Migrate to new patch series

Source & credits https://patchwork.ozlabs.org/project/uboot/list/?series=438193
I still need to figure out how to convert a patch series from patchwork in a way so the build framework doesn't complain about headers and magic and whatever. So a few hundreds of header lines have been replaced with something generic.

Applies and builds fine now against current stable v2024.10

* Create board-nanopi-r3s-fix-leds.patch

Thx #7556 (comment)

* Rename board-nanopi-r3s-fix-leds.patch to xx-board-nanopi-r3s-fix-leds.patch

* add new patch

config/boards/nanopi-r3s.csc

@@ -0,0 +1,49 @@
+# Rockchip RK3566 quad core, dual GBe NIC
+BOARD_NAME="FriendlyElec NanoPi R3S"
+BOARDFAMILY="rk35xx"
+BOARD_MAINTAINER=""
+BOOTCONFIG="nanopi-r3s-rk3566_defconfig"
+KERNEL_TARGET="edge"
+#KERNEL_TEST_TARGET="edge"
+FULL_DESKTOP="yes"
+BOOT_LOGO="desktop"
+BOOT_FDT_FILE="rockchip/rk3566-nanopi-r3s.dtb"
+IMAGE_PARTITION_TABLE="gpt"
+BOOT_SCENARIO="spl-blobs"
+BOOTFS_TYPE="fat" # Only for vendor/legacy
+
+function post_family_config_branch_edge__use_mainline_dtb_name() {
+	unset BOOT_FDT_FILE # boot.scr will use whatever u-boot detects and sets 'fdtfile' to
+	unset BOOTFS_TYPE   # mainline u-boot can boot ext4 directly
+}
+
+# Override family config for this board; let's avoid conditionals in family config.
+# vendor support not there yet
+function post_family_config__nanopi-r3s_use_vendor_uboot() {
+	BOOTSOURCE='https://github.com/radxa/u-boot.git'
+	BOOTBRANCH='branch:rk35xx-2024.01'
+	BOOTPATCHDIR="u-boot-radxa-latest"
+
+	UBOOT_TARGET_MAP="BL31=$RKBIN_DIR/$BL31_BLOB ROCKCHIP_TPL=$RKBIN_DIR/$DDR_BLOB;;u-boot-rockchip.bin"
+
+	unset uboot_custom_postprocess write_uboot_platform write_uboot_platform_mtd
+
+	function write_uboot_platform() {
+		dd if=$1/u-boot-rockchip.bin of=$2 seek=64 conv=notrunc status=none
+	}
+}
+
+function post_family_config_branch_edge__nanopi-r3s_use_mainline_uboot() {
+	BOOTCONFIG="nanopi-r3s-rk3566_defconfig"
+	BOOTSOURCE="https://github.com/u-boot/u-boot"
+	BOOTBRANCH="tag:v2024.10"
+	BOOTPATCHDIR="v2024.10"
+
+	UBOOT_TARGET_MAP="BL31=$RKBIN_DIR/$BL31_BLOB ROCKCHIP_TPL=$RKBIN_DIR/$DDR_BLOB;;u-boot-rockchip.bin"
+
+	unset uboot_custom_postprocess write_uboot_platform write_uboot_platform_mtd
+
+	function write_uboot_platform() {
+		dd if=$1/u-boot-rockchip.bin of=$2 seek=64 conv=notrunc status=none
+	}
+}