Add support for `shiva`

### Is your device already requested?

- [X] I have searched the existing issues

### Brand

Xiaomi

### Name

POCO M2

### Device code

shiva

### Model

_No response_

### Device images

_No response_

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

- [X] I own the device and am willing to test the installer on it.

### Additional context

_No response_