treewide: sysupgrade: use $UPGRADE_BACKUP to check for backup
Now that $UPGRADE_BACKUP is set conditionally there is no need to check the $UPGRADE_OPT_SAVE_CONFIG anymore. All conditions can be simplified. Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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		@@ -159,7 +159,7 @@ platform_do_upgrade_openmesh()
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	local cfg_size= kernel_size= rootfs_size=
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	local append=""
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	[ -f "$UPGRADE_BACKUP" -a "$UPGRADE_OPT_SAVE_CONFIG" -eq 1 ] && append="-j $UPGRADE_BACKUP"
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	[ -f "$UPGRADE_BACKUP" ] && append="-j $UPGRADE_BACKUP"
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	cfg_size=$(dd if="$img_path" bs=2 skip=35 count=4 2>/dev/null)
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	kernel_size=$(dd if="$img_path" bs=2 skip=71 count=4 2>/dev/null)
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