Initial integration of the rvb shifter
Created by: halfdan-dolva
Integrated rvb shifter.
SEC Clean.
~200 gate area increase in ALU, but ~400 gate decrease on top level. Half of the reduction happens in if_stage_i.instruction_obi_i, the rest is spread out.
Signed-off-by: Halfdan Bechmann halfdan.bechmann@silabs.com