sim-fast-core: adjust for changes made to master

- CRASH() changed to crash(avr).
- local _avr_fast_core_cycle_timer_process() reworked for recent
   changes in cycle timer code.
- bugfix for ld_rXYZ instructions
- removed likely/unlikely macro definitions as no longer needed
   due to being introduced elsewhere by another project contributor.

	modified:   ../../simavr/sim/sim_fast_core.c