Driver for NAFE13388

[rtborg]

I have a custom board with NAFE13388 analog frontend. It's an SPI slave device and I've written a custom driver which exposes basic functions such as device register read and write, reset, analog channel config, GPIO control and similar. The NAFE is highly configurable and I could not find an easy way of fitting it into the sensor interface.

I'd like to contribute the code, and the only place I can think of placing it is in the misc drivers. Is that the right place?