[entropy_src/rtl] fixes #5800

RNG FIFO had the incorrect pop signal.

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

hw/ip/entropy_src/rtl/entropy_src_core.sv

diff --git a/hw/ip/entropy_src/rtl/entropy_src_core.sv b/hw/ip/entropy_src/rtl/entropy_src_core.sv
index 9a5ccfe..bf36c09 100755
--- a/hw/ip/entropy_src/rtl/entropy_src_core.sv
+++ b/hw/ip/entropy_src/rtl/entropy_src_core.sv
@@ -577,7 +577,7 @@
 
   assign sfifo_esrng_clr  = !es_enable;
   assign sfifo_esrng_wdata = es_rng_bus;
-  assign sfifo_esrng_pop = es_enable && es_rate_entropy_pulse && sfifo_esrng_not_empty;
+  assign sfifo_esrng_pop = es_enable_rng && es_rng_src_valid && sfifo_esrng_not_empty;
 
   // note: allow input rng raw entropy to drop