ILI9341 inversion on ESP32-Wrover-Kit

[tore-espressif]

Hello,

ILI9341 display on ESP32-Wrover-Kit is always inverted, regardless off the settings Display orientation in menuconfig.
Problem lays on line 232 where correctly it should be

// 6C - portrait
// EC - portrait inverted
// CC - landscape
// 4C - landscape inverted
uint8_t data[] = {0x6C, 0xEC, 0xCC, 0x4C};

Nevertheless, I don't consider this solution satisfactory. This is screenshot from ILI9341 datasheet

There are 3 bits relevant for the display orientation and axis inversion: MY, MX, MV resulting in 8 different combinations.

My proposal is to split the Display orientation settings into three:

1. Display orientation -> Landscape/portrait
2. Invert X axis -> true/false
3. Invert Y axis -> true/false

Then this section of code and similar in other drivers can be removed and the default settings for each board could be resolved by KConfig. (e.g. selecting Wrover-kit would set Invert X: true and Invert Y: false)

Should be handled together with #3 and #21, any opinion is welcome.

Thanks

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NOTE

Not to be mistaken with color inversion. (command 0x20 and 0x21). #38

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