fs/ext2: add option for zstd compression

Signed-off-by: Vladimir Svoboda <vsvoboda@forkoder.eu>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

fs/ext2/Config.in

@@ -131,6 +131,11 @@ config BR2_TARGET_ROOTFS_EXT2_XZ
 	help
 	  Do compress the ext2 filesystem with xz.
 
+config BR2_TARGET_ROOTFS_EXT2_ZSTD
+	bool "zstd"
+	help
+	  Do compress the ext2 filesystem with zstd.
+
 endchoice
 
 endif # BR2_TARGET_ROOTFS_EXT2