Missing NVM44 (28FCS) firmware for Precision Mobile 5540


Latest firmware available in LVFS is this:
```
$ sudo fwupdmgr get-devices
Precision 5540
│
├─Thunderbolt Controller:
│ Device ID: 0c62146fa217fc169f4d006259608cc78a52ccb4
│ Summary: Unmatched performance for high-speed I/O
│ Current version: 41.00
│ Vendor: Dell (TBT:0x00D4)
│ GUIDs: ebb0a5b3-24fc-582d-9c60-58c0d7045350 ← THUNDERBOLT\VEN_00D4&DEV_0906&REV_00
│ d92f2014-425f-5023-b877-0ff468763d68 ← THUNDERBOLT\VEN_00D4&DEV_0906
│ 42598a87-0ee2-5d7e-b1d1-02a312041fd5 ← TBT-00d40906-native
│ 1d962ba4-9f85-5510-a85f-e4c94abf9b1d ← TBT-00d40906-native-controller0-0
│ Device Flags: • Internal device
│ • Updatable
│ • Requires AC power
│ • Device stages updates
$ sudo fwupdmgr get-updates
• Thunderbolt Controller has no available firmware updates
• Thunderbolt controller in Dell dock has the latest available firmware version
• Package level of Dell dock has the latest available firmware version
• RTS5413 in Dell dock has the latest available firmware version
• RTS5487 in Dell dock has the latest available firmware version
• VMM5331 in Dell dock has the latest available firmware version
• WD19TB has the latest available firmware version
• Samsung SSD 970 EVO 2TB has no available firmware updates
• System Firmware has the latest available firmware version
• TPM 2.0 has no available firmware updates
• Touchpad has no available firmware updates
```

No file or test is named. Start by reviewing the repository's existing Thunderbolt NVM update entries and compare them with the Precision 5540 and NVM44 details in the issue. Done means the missing firmware is represented so LVFS and fwupdmgr can offer it; verify with the relevant firmware-update workflow.

Written by the indexing model from the issue text.