- machine.c/h: add MACHINE_FNS1200P with verified GPIO assignments for
both SFP ports, LED SET0 (amber 2.5G / green 1G-100M-10M) and SET1
(SFP all-speeds), led_mux from original firmware register dump, and
machine_custom_init() enabling LED_GLB_IO_EN bit 6
- doc/devices/FNS-1200P.md: device overview, port layout, serial
console (S1 three through-holes = UART0 115200 8N1 3.3V),
LED and SFP GPIO tables
- doc/devices/photos/FNS-1200P/: chassis front panel and PCB top photos
- doc/supported_devices.md: add FNS-1200P to the list
GPIO assignments and LED register values were cross-checked between
live GPIO observation (RTLPlayground gpio command) and an original
firmware register dump.
