configs/orangepi_pc_defconfig: switch to extlinux

Changes:
* Switch to common orangepi scenario for multiple boards (board/orangepi/common) to create an SD image.
* Exclude FAT partition, it is no longer needed for U-Boot.
* Switch SD image from MBR to GPT for partition-uuid to work.
* Switch to extlinux, this is convenient for debugging.

Signed-off-by: Sergey Kuzminov <kuzminov.sergey81@gmail.com>
Reviewed-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Tested-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

board/orangepi/orangepi-pc/boot.cmd

@@ -1,8 +0,0 @@
-setenv fdt_high ffffffff
-
-setenv bootargs console=ttyS0,115200 earlyprintk root=/dev/mmcblk0p2 rootwait
-
-fatload mmc 0 $kernel_addr_r zImage
-fatload mmc 0 $fdt_addr_r sun8i-h3-orangepi-pc.dtb
-
-bootz $kernel_addr_r - $fdt_addr_r

board/orangepi/orangepi-pc/genimage.cfg

@@ -1,37 +0,0 @@
-# Minimal SD card image for the OrangePi PC
-#
-image boot.vfat {
-	vfat {
-		files = {
-			"zImage",
-			"sun8i-h3-orangepi-pc.dtb",
-			"boot.scr"
-		}
-	}
-
-	size = 10M
-}
-
-image sdcard.img {
-	hdimage {
-	}
-
-	partition u-boot {
-		in-partition-table = "no"
-		image = "u-boot-sunxi-with-spl.bin"
-		offset = 8K
-		size = 1016K # 1MB - 8KB
-	}
-
-	partition boot {
-		partition-type = 0xC
-		bootable = "true"
-		image = "boot.vfat"
-	}
-
-	partition rootfs {
-		partition-type = 0x83
-		image = "rootfs.ext4"
-		size = 512M
-	}
-}

configs/orangepi_pc_defconfig

@@ -5,8 +5,9 @@ BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_10=y
 BR2_TARGET_GENERIC_HOSTNAME="OrangePi_PC"
 BR2_TARGET_GENERIC_ISSUE="Welcome to Buildroot for the Orange Pi PC"
 BR2_SYSTEM_DHCP="eth0"
+BR2_ROOTFS_POST_BUILD_SCRIPT="board/orangepi/common/post-build.sh"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
-BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/orangepi/orangepi-pc/genimage.cfg"
+BR2_ROOTFS_POST_SCRIPT_ARGS="-c $(BINARIES_DIR)/genimage.cfg"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.10.9"
@@ -14,6 +15,7 @@ BR2_LINUX_KERNEL_DEFCONFIG="sunxi"
 BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/orangepi/orangepi-pc/linux.fragment"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="sun8i-h3-orangepi-pc"
+BR2_LINUX_KERNEL_INSTALL_TARGET=y
 BR2_TARGET_ROOTFS_EXT2=y
 BR2_TARGET_ROOTFS_EXT2_4=y
 # BR2_TARGET_ROOTFS_TAR is not set
@@ -27,9 +29,4 @@ BR2_TARGET_UBOOT_NEEDS_PYTHON3=y
 BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
 BR2_TARGET_UBOOT_FORMAT_CUSTOM=y
 BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME="u-boot-sunxi-with-spl.bin"
-BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT=y
-BR2_PACKAGE_HOST_UBOOT_TOOLS_BOOT_SCRIPT_SOURCE="board/orangepi/orangepi-pc/boot.cmd"
-BR2_PACKAGE_HOST_DOSFSTOOLS=y
 BR2_PACKAGE_HOST_GENIMAGE=y
-BR2_PACKAGE_HOST_MTOOLS=y
-BR2_PACKAGE_HOST_UBOOT_TOOLS=y