* fix(fmu-v6c): correct GPIO_VDD_3V3_SENSORS_EN macro name
VDD_3V3_SENSORS_EN() referenced GPIO_VDD_3V3_SENSORS4_EN which
does not exist. The correct macro is GPIO_VDD_3V3_SENSORS_EN.
Fixes#26454
* fix(boards): rename VDD_3V3_SENSORS4_EN to VDD_3V3_SENSORS_EN
These boards have a single sensor power rail that was incorrectly
named SENSORS4_EN (copy-paste from boards with 4 rails). Rename
to SENSORS_EN to match the actual hardware.
Boards with legitimately numbered rails (fmu-v6xrt, x25-evo,
x25-super) are not changed.
Add ARK_FMU_V6X to RCS netman
Remove arkv6x rc single wire
Fix arkv6x mtd
arkv6x bootloader init all pins to prevent power cycling peripherals on boot
arkv6x don't power cycle sd card on boot
arkv6x add UART4 Telem 4
Jacob Dahl