configs/orangepi_pc2: new defconfig

This patch adds a new defconfig for OrangePI PC2 board.

It was supported before in Buildroot, however due to problems in
building TF-A, it was removed in commit
eeede611f81d8f83b72e4a6671cd7d1e46b266b0. This commit re-adds it, in a
state that properly builds.

Signed-off-by: Javad Rahimi <javad321javad@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -1507,6 +1507,10 @@ F:	package/quota/
 N:	Jason Pruitt <jrspruitt@gmail.com>
 F:	package/librtlsdr/
 
+N:	Javad Rahimi <javad321javad@gmail.com>
+F:	board/orangepi/orangepi-pc2
+F:	configs/orangepi_pc2_defconfig
+
 N:	Jean Burgat <jeanburgat33@gmail.com>
 F:	package/openfpgaloader/
 

board/orangepi/orangepi-pc2/readme.txt

@@ -0,0 +1,37 @@
+Intro
+=====
+
+This default configuration will allow you to start experimenting with the
+buildroot environment for the Orangepi PC2. With the current configuration
+it will bring-up the board, and allow access through the serial console.
+
+Orangepi PC2 link:
+http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/details/Orange-Pi-PC-2.html
+
+Sunxi Wiki link:
+https://linux-sunxi.org/Xunlong_Orange_Pi_PC_2
+
+This configuration uses U-Boot mainline and kernel mainline.
+
+How to build
+============
+
+    $ make orangepi_pc2_defconfig
+    $ make
+
+Note: you will need access to the internet to download the required
+sources.
+
+How to write the SD card
+========================
+
+Once the build process is finished you will have an image called "sdcard.img"
+in the output/images/ directory.
+
+Copy the bootable "sdcard.img" onto an SD card with "dd":
+
+  $ sudo dd if=output/images/sdcard.img of=/dev/sdX
+  $ sudo sync
+
+Insert the micro SDcard in your Orangepi PC2 and power it up. The console
+is on the serial line, 115200 8N1.

configs/orangepi_pc2_defconfig

@@ -0,0 +1,36 @@
+BR2_aarch64=y
+BR2_ARM_FPU_VFPV4=y
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_16=y
+BR2_TARGET_GENERIC_ISSUE="Welcome to Orangepi PC2"
+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 $(BINARIES_DIR)/genimage.cfg"
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.16.1"
+BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
+BR2_LINUX_KERNEL_DTS_SUPPORT=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="allwinner/sun50i-h5-orangepi-pc2"
+BR2_LINUX_KERNEL_DTB_KEEP_DIRNAME=y
+BR2_LINUX_KERNEL_INSTALL_TARGET=y
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_SIZE="128M"
+BR2_TARGET_ARM_TRUSTED_FIRMWARE=y
+BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_VERSION=y
+BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_VERSION_VALUE="v2.5"
+BR2_TARGET_ARM_TRUSTED_FIRMWARE_PLATFORM="sun50i_a64"
+BR2_TARGET_UBOOT=y
+BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
+BR2_TARGET_UBOOT_CUSTOM_VERSION=y
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2022.01"
+BR2_TARGET_UBOOT_BOARD_DEFCONFIG="orangepi_pc2"
+BR2_TARGET_UBOOT_NEEDS_DTC=y
+BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
+BR2_TARGET_UBOOT_NEEDS_OPENSSL=y
+BR2_TARGET_UBOOT_NEEDS_ATF_BL31=y
+BR2_TARGET_UBOOT_SPL=y
+BR2_TARGET_UBOOT_SPL_NAME="u-boot-sunxi-with-spl.bin"
+BR2_TARGET_UBOOT_CUSTOM_MAKEOPTS="SCP=/dev/null"
+BR2_PACKAGE_HOST_GENIMAGE=y