previous overlays tested on 11-STABLE won't work in -CURRENT. need to test in 11-STABLE after the
changes to -CURRENT are back-ported to 11-STABLE, particularly the dtb files for rpi and rpi2 .
This overlay contains fixes for pins for spi0@7e200000 and spi0_cs_pins. Need to test CS==2 on RPi2 to verify it's working.