Add a function to read gn4124 interrupt configuration.

- Returns all registers.
- Two dimensions table [address, data]

This is the tool used to fill the FMC EEPROM with IPMI and calibration data.

Always print register value, even if it contains fields.

Forgot to remove legacy argument, not useful anymore.

 - get/set register
 - get/set field in register
 - print register map

Call to irqena.

Note: The driver is disabling the interrupts in the ISR.
      Therefore, the user have to explicitly enable interrupts again.

Exception from lower level modules (i2c, spi, onewire, etc...) are forwarded
to the upper layer by the device modules (ds18b20, ltc217x, etc...).
Each layer is adding specific informations to the error message (e.g.
wishbone core base address, spi slave number or i2c address, etc...).
This will simplify the exception handling in the higher level modules.

Comments review.

Adding exception class, comments, etc...

-> more generic function name.

Exception based error handeling.

Adding more function for configuration.

    * read and write byte functions.
    * page write function with size and page boundary check.
    * sequencial read function.

Apply changes made by Richard to the eeprom_24aa64 module.

    Changes made by Richard Carrillo (7solutions) for the fmcdio5chttla.
        * Proper exception raising and handling.
        * Avoiding infinite loop by adding timeouts.

Some cleanup in the comments and commented debug messages.

    Changes made by Richard Carrillo (7solutions) for the fmcdio5chttla.
    * Proper exception raising and handling.
    * Avoiding infinite loop by adding timeouts.

Fix a bug introduced in the scan function.
Was not scanning the last address and sending write instead of read operation.

Some cleanup in the comments and commented debug messages.

Changes made by Richard Carrillo (7solutions) for the fmcdio5chttla.
* Proper exception raising and handling.
* Avoiding infinite loop by adding timeouts.

Some cleanup in the comments and commented debug messages.

This function is used by the fmc_delay C library.

Add a first set of common modules from fmcadc100m14b4cha.

Fix C shared library path in rr.py
Remove undefined rr_read and rr_write from rrlib.h
Remove rr.py and rrlib.so from pts root directory.
Put updated versions of rr.py, rrlib.so and rr_loader_lib.so in
test/fmcadc100m14b4cha/python those should be removed when all
tests will use common modules.

Library features are:
- Gennum GPIO configuration
- SPEC boot mode selection (Gennum to FPAG, Genum to Flash or Flash to FPGA)
- Bit bang SPI programming/erase/readback of the Flash
- Force FPGA reload from flash
- FPGA firmware loading using Gennum FCL (= FPGA Configuration Loader)

Function to load FPGA firmware from Gennum added to Python wrapper rr.py

Added the generation of the libfpga_loader shared library. And
comment the output messages of the fpga_loader.

This fpga_loader is only valid for SPEC V2.0 or higher.