SQUASH: Revert "overlays: Fix dtc warnings in i2c-gpio"

This reverts commit 1c15edc0dca002c8536e9f1f5e1ec43017815018.

This revert and its neighbour are opposites. When squashing, delete
the original commits as well.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>