AT91SAM9G20 full version

git-svn-id: https://192.168.1.10:1230/svn/kernel@33 fe49f5b3-f700-de4c-8f4e-3636014279d1
I2C: set i2c1 frequency down to 40kHz, otherwise we can't read or write from attiny45.

git-svn-id: https://192.168.1.10:1230/svn/kernel@34 fe49f5b3-f700-de4c-8f4e-3636014279d1
DISPLAY: speed up spi transfer efficiency

git-svn-id: https://192.168.1.10:1230/svn/kernel@35 fe49f5b3-f700-de4c-8f4e-3636014279d1