PMP Configuration Registers pmpcgf1 and pmpcfg3 for CV32A6 is not present for CSR Read

Created by: nathpranay

As per specification for 32 Bit CPU we should have CSR_PMPCFG0, CSR_PMPCFG1, CSR_PMPCFG2 and CSR_PMPCFG3. How ever for 64 bit CPU, it requires only CSR_PMPCFG0 and CSR_PMPCFG2 [ For CSR Read this is present in RTL]. For CSR Read CSR_PMPCFG1 and CSR_PMPCFG3 is not present which is required for 32 Bit CPU.