mvebu: fix sysupgrade

Backport another sysupgrade patch.

patches/lede/0030-mvebu-fix-sysupgrade.patch

+From: Matthias Schiffer <mschiffer@universe-factory.net>
+Date: Thu, 1 Jun 2017 18:39:12 +0200
+Subject: mvebu: fix sysupgrade
+
+mvebu was modifying RAMFS_COPY_BIN and RAMFS_COPY_DATA from a
+sysupgrade_pre_upgrade hook. As the ramfs is created from stage2, this
+did not have an effect anymore after the staged sysupgrade changes.
+
+As it doesn't really hurt to copy fw_printenv and fw_setenv
+unconditionally, simply add them in /lib/upgrade/platform.sh, so stage2
+will see them.
+
+Config copying is moved to a function called by platform_copy_config, where
+it belongs.
+
+Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
+Fixes: FS#821
+Fixes: 30f61a34b4cf "base-files: always use staged sysupgrade"
+
+diff --git a/package/base-files/files/lib/upgrade/stage2 b/package/base-files/files/lib/upgrade/stage2
+index cc8047d988e39ca9ba27d2588744aad469d1d978..bdbb8926643287f48a4ae62c5d1d4b4a29130859 100755
+--- a/package/base-files/files/lib/upgrade/stage2
++++ b/package/base-files/files/lib/upgrade/stage2
+@@ -48,7 +48,7 @@ switch_to_ramfs() {
+ 		/bin/sleep /bin/zcat /usr/bin/bzcat /usr/bin/printf /usr/bin/wc \
+ 		/bin/cut /usr/bin/printf /bin/sync /bin/mkdir /bin/rmdir	\
+ 		/bin/rm /usr/bin/basename /bin/kill /bin/chmod /usr/bin/find \
+-		/bin/mknod
++		/bin/mknod /bin/touch
+ 
+ 	install_bin /sbin/mtd
+ 	install_bin /sbin/mount_root
+diff --git a/target/linux/mvebu/base-files/lib/upgrade/linksys.sh b/target/linux/mvebu/base-files/lib/upgrade/linksys.sh
+index d06a1b8ed0534364b595618f24b65f9f3a3e275d..63d1cd14a4deed407b217a518ae25a752f62969e 100644
+--- a/target/linux/mvebu/base-files/lib/upgrade/linksys.sh
++++ b/target/linux/mvebu/base-files/lib/upgrade/linksys.sh
+@@ -73,21 +73,7 @@ platform_do_upgrade_linksys() {
+ 	}
+ }
+ 
+-linksys_preupgrade() {
+-	local board=$(mvebu_board_name)
+-
+-	case "$board" in
+-	armada-385-linksys-caiman|armada-385-linksys-cobra|armada-385-linksys-shelby|armada-xp-linksys-mamba|armada-385-linksys-rango)
+-		export RAMFS_COPY_BIN="${RAMFS_COPY_BIN} /usr/sbin/fw_printenv /usr/sbin/fw_setenv"
+-		export RAMFS_COPY_BIN="${RAMFS_COPY_BIN} /bin/mkdir /bin/touch"
+-		export RAMFS_COPY_DATA="${RAMFS_COPY_DATA} /etc/fw_env.config /var/lock/fw_printenv.lock"
+-
+-		[ -f /tmp/sysupgrade.tgz ] && {
+-			cp /tmp/sysupgrade.tgz /tmp/syscfg/sysupgrade.tgz
+-		}
+-		;;
+-	esac
++platform_copy_config_linksys() {
++	cp -f /tmp/sysupgrade.tgz /tmp/syscfg/sysupgrade.tgz
++	sync
+ }
+-
+-append sysupgrade_pre_upgrade linksys_preupgrade
+-
+diff --git a/target/linux/mvebu/base-files/lib/upgrade/platform.sh b/target/linux/mvebu/base-files/lib/upgrade/platform.sh
+index 77578e28d42fb7ca5e3f057e42ac5818e851736f..55c084483995d548556a560e171462f2d5456172 100755
+--- a/target/linux/mvebu/base-files/lib/upgrade/platform.sh
++++ b/target/linux/mvebu/base-files/lib/upgrade/platform.sh
+@@ -5,7 +5,8 @@
+ 
+ . /lib/mvebu.sh
+ 
+-RAMFS_COPY_DATA=/lib/mvebu.sh
++RAMFS_COPY_BIN='/usr/sbin/fw_printenv /usr/sbin/fw_setenv'
++RAMFS_COPY_DATA='/lib/mvebu.sh /etc/fw_env.config /var/lock/fw_printenv.lock'
+ REQUIRE_IMAGE_METADATA=1
+ 
+ platform_check_image() {
+@@ -31,6 +32,9 @@ platform_copy_config() {
+ 	local board=$(mvebu_board_name)
+ 
+ 	case "$board" in
++	armada-385-linksys-caiman|armada-385-linksys-cobra|armada-385-linksys-rango|armada-385-linksys-shelby|armada-xp-linksys-mamba)
++		platform_copy_config_linksys
++		;;
+ 	armada-388-clearfog)
+ 		platform_copy_config_clearfog "$ARGV"
+ 		;;