wt32sc01-plus: pins from the datasheet, freq=, and a 10 MHz bus

[bdbarnett]

This makes the WT32-SC01 Plus config work on the glass. Each change was proven on Brad's board on 2026-10-05, running micropython-pydevices' new generic-S3 image.

• No LCD chip-select. The datasheet (Panlee ZX3D50CE02S-USRC-4832, Tab. 5) lists none, and GPIO 6, which the config gave the bus as CS, is the touch controller's SDA.
• The SD card is on 38–41 (Tab. 4), not 11–13.
• freq=, not frequency=. That's CircuitPython's keyword, and MicroPython's machine.I2C raises on it. ili9341_i80_rp2040 had the same slip.
• The i80 bus runs at 15 MHz, the ST7796's rated write cycle of 66 ns. At the bus's 30 MHz default the panel showed only noise. At 20 MHz, lv_test_timer.py left bands unpainted and put arc pixels on the wrong rows. At both 10 and 15 MHz Brad reports it painting perfectly.