[gta02-core] component update

[Werner Almesberger]

Sean sent me a list of the inventory at the factory. There are
plenty of mechanical parts left. Electrical parts are more of a
problem. The most important shortages:

- SDRAM, Samsung K4M51323
- Audio Codec, Wolfson WM8753
- Power supply, NXP 50633-04 
- GPS receiver, u-blox ATR0635
- LCD module

Difficult parts that are in stock include the CPU, BT, and WLAN.

There seem to be some inconsistencies in the inventory, so some
positions may still change.

I've asked Sean if I can post some of the spreadsheet he sent me
to the list.

- Werner