fs: ext4: fix symlink read function

The function ext4fs_read_symlink was unable to handle a symlink
which had target name of exactly 60 characters.
Signed-off-by: NRonald Zachariah <rozachar@cisco.com>
Signed-off-by: NStefan Roese <sr@denx.de>
Reviewed-by: NStephen Warren <swarren@nvidia.com>
Cc: Tom Rini <trini@konsulko.com>

fs/ext4/ext4_common.c

@@ -2040,7 +2040,7 @@ static char *ext4fs_read_symlink(struct ext2fs_node *node)
 	if (!symlink)
 		return 0;
 
-	if (__le32_to_cpu(diro->inode.size) <= 60) {
+	if (__le32_to_cpu(diro->inode.size) < sizeof(diro->inode.b.symlink)) {
 		strncpy(symlink, diro->inode.b.symlink,
 			 __le32_to_cpu(diro->inode.size));
 	} else {