Add support for LSM6SV

[skerr92]

As the title suggests, I'd like there to be support for the LSM6DSV part of the LSM6DS family of sensors. The LSM6DSV provides some newer functionality compared to some of the other LSM6DS sensors.

I can probably do some of the initial work for the sensor, though advanced features might take more time to bring up which is why I am creating this issue.

[tekktrik]

Sounds neat! Would be cool to have a new one! You could probably get the skeleton out there and then add functionality piecewise, if you'd prefer (assuming it's basically just defining the chip ID and you get most everything else for free). Happy to help!