Initial support for ILI9481 TFT Controller

ILI9481 is usually available with IPS with inverted colors.
ILI9481 SPI write speed is 10MHz by datasheet but working with 16MHz.

README: Add note about using make instead of idf.py when using ESP-IDF v3.x

Define offset for Ttgo display

Initial RA8875 Display Support (SPI)

Add initial touch support for the RAiO RA8875 over SPI.

Add initial display support for the RAiO RA8875 over SPI.

Add API to allow removing the display SPI device, specifying the speed
for a new device, and changing the speed of the device.

Finish implementing DISP_SPI_ADDRESS_<x> flags by adding support
for 8, 16, and 32 bit addresses.

Change lengths from uint16_t to size_t to prevent the length
from overflowing when transferring large buffers.

Add additional divider options for the SPI CLK to allow configuring
for slower clocks.

Add input delay configuration to account for delay in SCLK making
it to a display device and the MISO signal coming back.

Add additional support for LVGL configuration from Kconfig

Define touch pins when using FT81X controller

Add Debug/Text Settings to Kconfig and lv_conf.h

LVGL Kconfig: Add Input device settings into the menuconfig

Moved LV_USE_LOG and log level to Kconfig