image: add lz4 zstd compression magic map

Add lz4 and zstd compression magic map. Already can decompress images
with lz4 and zstd compression type.

Signed-off-by: Artem Lapkin <art@khadas.com>
diff --git a/common/image.c b/common/image.c
index 59c52a1..e199d61 100644
--- a/common/image.c
+++ b/common/image.c
@@ -216,6 +216,8 @@
 	{	IH_COMP_GZIP,	"gzip",		{0x1f, 0x8b},},
 	{	IH_COMP_LZMA,	"lzma",		{0x5d, 0x00},},
 	{	IH_COMP_LZO,	"lzo",		{0x89, 0x4c},},
+	{	IH_COMP_LZ4,    "lz4",          {0x04, 0x22},},
+	{	IH_COMP_ZSTD,   "zstd",         {0x28, 0xb5},},
 	{	IH_COMP_NONE,	"none",		{},	},
 };