Add support for RMX1971

[derist27]

Device informations

• Brand: REALME
• Phone name: REALME 5 PRO
• Device code (if unknown, leave blank):
• Model (if several models exist): RMX1971

Device images
Please provide links to any available images of the device, such as official stock firmware or custom ROMs you would like to install.

Do you own the device and would be willing to test the installer?

• [ ]

Additional context
Please provide any additional context or information that may be helpful in adding support for this device.

[MagicLike]

tagging @anon1892 (?)

No, sorry, don't know this brand... Only Xiaomi / Poco.
Flashing recovery seems to be like #222, but I don't know the unlocking bootloader process.