Enable second HW SPI for ESP32

[s-hadinger]

Description:

Allows to configure a second Hardware SPI in settings.
ESP32 has 4 hardware SPI (SPI 0 to 3). SPI0 and SPI1 are reserved. SPI2 is also called HSPI and supports DMA. SPI3 is called VSPI on ESP32 or OSPI on ESP32 S2, and is not capable of DMA on S2.

Arduino SPI object maps to VSPI or OSPI, i.e. SPI3.

SPI #2 in Tasmota will actually map to HSPI which is SPI2.

In a nutshell numbers are reversed... But you shouldn't care too much.

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works on Tasmota core ESP8266 V.2.7.4.9
• The code change is tested and works with core ESP32 V.1.0.6
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass