configs/cubieboard2: switch to use extlinux.conf

Switch to extlinux instead of U-Boot boot script.
Remove obsolete entry from the .checkpackageignore file.
Drop custom boot script and genimage config.
Drop unnecessary generic and host configs.

Signed-off-by: Scott Fan <fancp2007@gmail.com>
Signed-off-by: Romain Naour <romain.naour@smile.fr>

board/cubietech/cubieboard2/boot.cmd

@@ -1,5 +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 sun7i-a20-cubieboard2.dtb
-bootz $kernel_addr_r - $fdt_addr_r

board/cubietech/cubieboard2/genimage.cfg

@@ -1,18 +1,3 @@
-# Minimal SD card image for the Cubieboard2
-# Based in the Orange Pi genimage.cfg
-
-image boot.vfat {
-	vfat {
-		files = {
-			"zImage",
-			"sun7i-a20-cubieboard2.dtb",
-			"boot.scr"
-		}
-	}
-
-	size = 16M
-}
-
 image sdcard.img {
 	hdimage {
 	}
@@ -24,15 +9,8 @@ image sdcard.img {
 		size = 1016K # 1MB - 8KB
 	}
 
-	partition boot {
-		partition-type = 0xC
-		bootable = "true"
-		image = "boot.vfat"
-	}
-
 	partition rootfs {
 		partition-type = 0x83
 		image = "rootfs.ext4"
-		size = 512M
 	}
 }

board/cubietech/cubieboard2/post-image.sh

@@ -1,16 +0,0 @@
-#!/bin/sh
-
-BOARD_DIR="$(dirname $0)"
-GENIMAGE_CFG="${BOARD_DIR}/genimage.cfg"
-GENIMAGE_TMP="${BUILD_DIR}/genimage.tmp"
-
-rm -rf "${GENIMAGE_TMP}"
-
-genimage                           \
-	--rootpath "${TARGET_DIR}"     \
-	--tmppath "${GENIMAGE_TMP}"    \
-	--inputpath "${BINARIES_DIR}"  \
-	--outputpath "${BINARIES_DIR}" \
-	--config "${GENIMAGE_CFG}"
-
-exit $?

board/cubietech/cubieboard2/rootfs_overlay/boot/extlinux/extlinux.conf

@@ -0,0 +1,4 @@
+label cubieboard-buildroot
+  kernel /boot/zImage
+  devicetree /boot/sun7i-a20-cubieboard2.dtb
+  append console=ttyS0,115200 earlyprintk root=/dev/mmcblk0p1 rootwait