Version 6.6.78-datum.1: OTP28 / STLinux v6.1.0 working. Needs optimiz…

…ation and regression tests.

Update version string to 6.6.78-mark.4

Add mcp9902 driver for linux v6.

Use Ethernet internal MAC clock.

Add VSCode workspace file from older Datum 5.15 branch.

Change SPI drivers runtime power management behavior to only tri-stat…

…e the pinmux when suspending. This seems to fix the glitch seen on the SPI2 Clock line.

Disable Linux runtime power manager for all embedded SPI and I2C peri…

…pherals. Fixes a glitch problem on the SPI2 clock during PM powerdown for the T7XC. Bump Linux version to 5.15.145-datum.4.

Properly report retry count.

Change SPI2 polling inteval from 1000ms to 100ms for debug.

Update reported version to 5.15.145-datum.2 for tracking purposes.