[edn/csrng] change REGWEN to be module enable based

Signed-off-by: Mark Branstad <mark.branstad@wdc.com>

hw/ip/csrng/rtl/csrng_state_db.sv

diff --git a/hw/ip/csrng/rtl/csrng_state_db.sv b/hw/ip/csrng/rtl/csrng_state_db.sv
index 2cd40a2..30ec6a5 100644
--- a/hw/ip/csrng/rtl/csrng_state_db.sv
+++ b/hw/ip/csrng/rtl/csrng_state_db.sv
@@ -51,6 +51,7 @@
   localparam int InternalStateWidth = 2+KeyLen+BlkLen+CtrLen;
   localparam int RegInternalStateWidth = 30+InternalStateWidth;
   localparam int RegW = 32;
+  localparam int StateWidth = 1+1+KeyLen+BlkLen+CtrLen+StateId+1;
 
   logic [StateId-1:0]              state_db_id;
   logic [KeyLen-1:0]               state_db_key;
@@ -170,7 +171,8 @@
   assign {state_db_fips,state_db_inst_st,
           state_db_key,
           state_db_v,state_db_rc,
-          state_db_id,state_db_sts} = {state_db_wr_fips_i,instance_status,
+          state_db_id,state_db_sts} = {StateWidth{state_db_enable_i}} &
+                                      {state_db_wr_fips_i,instance_status,
                                        state_db_wr_key_i,
                                        state_db_wr_v_i,state_db_wr_res_ctr_i,
                                        state_db_wr_inst_id_i,state_db_wr_sts_i};
@@ -184,15 +186,12 @@
   assign state_db_write = state_db_enable_i && state_db_wr_req_i;
 
   assign state_db_sts_ack_d =
-         (!state_db_enable_i) ? '0 :
          state_db_write;
 
   assign state_db_sts_sts_d =
-         (!state_db_enable_i) ? '0 :
          state_db_sts;
 
   assign state_db_sts_id_d =
-         (!state_db_enable_i) ? '0 :
          state_db_id;
 
   assign state_db_sts_ack_o = state_db_sts_ack_q;