dts/connect: Prefix pinmuxes which are already defined in the dts [REVPI-2285]
Created by: iluminat23
If we redefine muxes which are already defined in the devicetree we might get errors when loading the overlay at runtime. Renaming these pinmuxes resolves the collisions.
See https://github.com/RevolutionPi/linux/pull/97 for a different solution to this issue.