Add MIPS SYSV ABI argument area to initial task stack layout
Reduce the task exit stack expansion area to 32 words (size of task register context)
Set the minimum task stack size to 68 (32 words register context + 4 argument words in initial stack + 32 words task exit stack expansion area)
Reduce timer and idle task stacks
Reduce default interrupt stack size to 128 words
The interrupt stack size preprocessor macro TN_INT_STACK_SIZE can be defined in the project options without modifying the source code