The timeout was setup to 1 second (HZ constant in jiffies) to fix a problem
in the test/spec/python/test07.py.

This test file was always waiting for the IRQ from the first DMA.

The DMA transfer was properly finished but the IRQ doesn't arrive. It seems
that the problem behind is a wrong initialization (reset?) of the corresponding
DMA core in the Firmware.

This is a workaround of the problem.

The problem was a wrong setup of the polarity in the crossing point chip (ADN4600)
mounted in the FMC carrier tester.

Also, it has been added an example program to write and check the
Mezzanine's EEPROM in test/example/python directory.