This pull requests adds a menuconfig option named `ESP32_HUB75_USE_GFX` which is used to determine if the Adafruit GFX component should be required and used for the build. menuconfig options are the standard way to change behavior of components in `esp-idf`.
[Commit b8367d9](b8367d95d2) introduced a backwards incompatible change that caused `idf-idf` to only require the Adafruit-GFX-Library component if `ARDUINO_ARCH_ESP32` was set. `ARDUINO_ARCH_ESP32` is set in platformIO, the arduino software but not in the standalone `esp-idf` installation.
