* Use #ifdefs for 32/64 bit code
* Use unsigned long which is 32-bit on riscv32 and 64-bit on riscv64 (register size)
* Move the code to a new shared riscv folder to be shared between riscv32 and riscv64
* Rename RTEMS_CPU extracted from command line to shared riscv target s/riscv*/riscv
Update #3109
11ff3a9e72