PicoSoC: Use RDSR1+RDCR1+WRR instead of RDAR+WRAR
PicoSoC: Use RDSR1+RDCR1+WRR instead of RDAR+WRAR

Signed-off-by: Clifford Wolf <b28e7ff75903c06de987a1eb75ea100a79c89e3a@clifford.at>

cliffordwolf/picorv32,cliffordwolf/picorv32,cliffordwolf/picorv32,cliffordwolf/picorv32