Add support for TyT MD-UV380.

[hmatuschek]

This radio may be identical to the MD-UV390. Should be checked though. If not verify codeplug elements. That is,

• [ ] Timestamp
• [ ] General settings
• [ ] Menu settings
• [ ] Button settings
• [ ] Messages
• [ ] Encryption
• [ ] Emergency systems
• [ ] Group lists
• [ ] Zones
• [ ] Scan lists
• [ ] VFO Channels
• [ ] Boot settings
• [ ] Channel encoding
• [ ] DMR Contacts

[hmatuschek]

Looks like virtually identical radios.