Fixed printout that used deprectated rpl_parent_t structure

Reverted commit below as the cc65 bug in question is fixed.

Rearranged some expressions to avoid triggering a cc65 bug. (reverse-merged from commit 7134da09)

MRHOF fixes

Final adjustments for the switch from 'atari' to 'atarixl'.

Finetuned Atari XL memory layout.

The Telent server includes both uIP logging and uIP client functionality. Therefore uip.o is somewhat larger.

Rearranged some expressions to avoid triggering a cc65 bug.

Code Style: Add uncrustify config and helper scripts

Added missing 'atarixl' Makefile defines.

Adjustments for the switch from 'atari' to 'atarixl'.

Some beautification for the Contiki online configurator.

Removed support for 'atari' now that 'atarixl' is part of the cc65 master.

Adjusted Makefile to the final 'atarixl' cc65 target.

- Assign source files to the splitted shadow RAM areas.
- Switched to dynamic Ethernet driver loading.

Saved another byte ;-)

Add a method to stop running trickle timers

Added SPI driver for CC2538

This uses the core/dev/spi.h header and implements the spi_init()
function and the various macros for SPI operation. ssi.h contains all of
the register locations and information.

This implementation is not very versatile, mostly because I don't how to
make it flexible in the contiki system. It supports pin muxing for the
four spi pins, but other than that picks sensible defaults.

The SPI macros (like SPI_READ()) are defined in
cpu/cc2538/spi-arch.h. In order to use the SPI driver, add the following
includes to your project:

    #include "spi-arch.h
    #include "dev/spi.h"

Small fixes to networking files

Cleaned up various fragments and fixed a compilation error that occured when switching metric container.

Fixed a wrapping problem in the ETX EWMA calculation.

Corrected the multiplier of the link metric, and simplified the configuration
so that the user does not need to specify the multiplier.

Fixed fail to build from source due to a bad &nbr->lladdr

Typo and file mode fix for Trickle library, typo fix in uipopt.h

Optimized 6502 Ethernet drivers.

- Speed: The primary byte copy loops are reduzed to the bare minimum by adjusting the base pointer 'ptr' and loop register 'y' in such a way that the 'y' overflow matches the low byte of the loop size.

- Introduced a loop for setting the MAC address.

Additional minor fix:

- Properly start self modification with first location.