ODROID HC4: edge: experimental: SPI+SATA boot on HC4 via chewitt's amlogic-2021.07 uboot tree (#3106)

- done in a single if block in sm1 family
- add nand-sata-install support via UBOOT_TARGET_MAP and write_uboot_platform_mtd

Signed-off-by: Ricardo Pardini <ricardo@pardini.net>

config/sources/families/meson-sm1.conf

@@ -6,6 +6,26 @@ GOVERNOR=ondemand
 
 [[ ${BRANCH} == legacy ]] && SERIALCON=ttyS0
 
+if [[ ${BRANCH} == edge ]] && [[ $BOARD == odroidhc4 ]]; then
+	# Experimental, use chewitt's u-boot, which enables SPI+SATA booting.
+	display_alert "Using experimental u-boot with SPI+SATA" "edge+odroidhc4" "info"
+	BOOTSOURCE="https://github.com/chewitt/u-boot.git"
+	BOOTDIR='u-boot-chewitt'
+	BOOTBRANCH='branch:amlogic-2021.07'
+	UBOOT_TARGET_MAP="u-boot-dtb.img;;u-boot.bin.sd.bin:u-boot.bin u-boot-dtb.img u-boot.bin:u-boot-spi.bin"
+	BOOTCONFIG="odroid-hc4_defconfig" # hc4_defconfig vs c4_defconfig, enables PCIe+SATA stuff.
+
+	write_uboot_platform_mtd() {
+		if [[ -f $1/u-boot-spi.bin ]]; then
+			dd if=$1/u-boot-spi.bin of=/dev/mtdblock0
+			sync
+		else
+			echo "SPI u-boot image not found!"
+			exit 1
+		fi
+	}
+fi
+
 family_tweaks()
 {
 	: