[gta02-core] New on-board WLAN - 1st attempt

[Álvaro Lopes]

Hi all,

I just did a first attempt at new on-board WLAN. Please take a quick look. Antenna and antenna connector still missing.

I renamed the old wlan sheet to "wlan-conn.sch" so we can go back if needed, just changing the project file.

There are some inconsistencies in component names (like R3,R2,R1). I'll fix those and describe mappings in one ECN.

Álvaro