New protocol decoder: eeprom93xx

libsigrokdecode supports another protocol decoder since a little while ago, eeprom93xx.

This is a PD that stacks on top of the previously announced microwire decoder, and provides higher-level 93xx Microwire EEPROM specific decoded data.

As usual, there are some example files in sigrok-dumps and some test-cases in sigrok-test.

The protocol decoder was contributed by Kevin Redon, thanks a lot!