[PATCH] dt-bindings: pinctrl: mediatek: mt6795: document the slew-rate property

[Luca Leonardo Scorcia]

Hi!

> Do you know that value for the SoC to you can express it like
> this and translate it in the driver?

Unfortunately the data sheet I have doesn't say anything more - just
"Normal slew" or "Slower slew", and I don't have a scope to measure
it. All I know is that it flips a single bit in a configuration
register.

I found this missing property while working on the Xiaomi Mi Smart
Clock x04g (mt8167). I ported the current pinctrl driver for
mt8516/mt8167 to the paris platform driver (adding support for slew
rate and r1r0 pullups in the process) but the stock device tree sets a
slower slew rate for the speaker amp. Without this patch it would
trigger a dts error.

Thanks!
-- 
Luca