Update RP2040 18bit PIO SPI code for 18 bit SPI displays (tested on ILI9488) Add ILI9342_DRIVER option for default landscape display.
Images/sprites overlapping both sides of the display were not correctly cropped. Option added to allow RGB<>BGR colourr swap option to be used. ESP8266 Wemos D1 R1 pin numbering difference accomodated. TTGO T4 setup changed to use HSPI port.
Not yet fully tested but seems to work OK!