configs/roc_pc_rk3399: remove defconfig

This defconfig has been failing to build for several months, with
nobody stepping up to fix it. It's time to drop it.

See
https://lore.kernel.org/buildroot/20220806224338.0159e15c@windsurf/
for a notification on August 6, 2022 about the issues with this
defconfig.

Fixes:

  https://gitlab.com/buildroot.org/buildroot/-/jobs/3259671226

Cc: Suniel Mahesh <sunil@amarulasolutions.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -2728,13 +2728,11 @@ F:	package/hwloc/
 F:	package/powertop/
 
 N:	Suniel Mahesh <sunil@amarulasolutions.com>
-F:	board/firefly/
 F:	board/friendlyarm/nanopi-m4
 F:	board/pine64/rockpro64
 F:	board/radxa/rockpi-4
 F:	board/radxa/rockpi-n8
 F:	board/radxa/rockpi-n10
-F:	configs/roc_pc_rk3399_defconfig
 F:	configs/rock_pi_4_defconfig
 F:	configs/rock_pi_n8_defconfig
 F:	configs/rock_pi_n10_defconfig

board/firefly/roc-rk3399-pc/extlinux.conf

@@ -1,4 +0,0 @@
-label RK3399RocPC linux
-  kernel /boot/Image
-  devicetree /boot/rk3399-roc-pc.dtb
-  append earlycon=uart8250,mmio32,0xff1a0000 root=/dev/mmcblk0p1 rootwait

board/firefly/roc-rk3399-pc/genimage.cfg

@@ -1,22 +0,0 @@
-image sdcard.img {
-	hdimage {
-	}
-
-	partition u-boot-tpl-spl-dtb {
-		in-partition-table = "no"
-		image = "idbloader.img"
-		offset = 32K
-	}
-
-	partition u-boot-dtb {
-		in-partition-table = "no"
-		image = "u-boot.itb"
-		offset = 8M
-		size = 30M
-	}
-
-	partition rootfs {
-		partition-type = 0x83
-		image = "rootfs.ext4"
-	}
-}

board/firefly/roc-rk3399-pc/post-build.sh

@@ -1,5 +0,0 @@
-#!/bin/sh
-
-BOARD_DIR="$(dirname $0)"
-
-install -m 0644 -D $BOARD_DIR/extlinux.conf $TARGET_DIR/boot/extlinux/extlinux.conf

board/firefly/roc-rk3399-pc/readme.txt

@@ -1,40 +0,0 @@
-Libre Computer Board ROC-RK3399-PC
-===================================
-
-Build:
-
-  $ make roc_pc_rk3399_defconfig
-  $ make
-
-Files created in output directory
-=================================
-
-output/images
-
-├── bl31.elf
-├── idbloader.img
-├── Image
-├── rk3399-roc-pc.dtb
-├── rootfs.ext2
-├── rootfs.ext4 -> rootfs.ext2
-├── rootfs.tar
-├── sdcard.img
-├── u-boot.bin
-└── u-boot.itb
-
-Creating bootable SD card:
-==========================
-
-Simply invoke (as root)
-
-sudo dd if=output/images/sdcard.img of=/dev/sdX && sync
-
-Where X is your SD card device
-
-Serial console
---------------
-
-Baudrate for this board is 1500000
-
-Wiki link:
-https://wiki.amarulasolutions.com/bsp/rockchip/rk3399/roc-rk3399-pc.html