[dv/kmac] fix CFG.entropy_ready exclusion

This CSR field needs to be not written at all in any CSR test, otherwise
it has the potential to cause a whole assortment of strange issues
during simulation due to it kick-starting the entropy FSM.

Signed-off-by: Udi Jonnalagadda <udij@google.com>

hw/ip/kmac/data/kmac.hjson

diff --git a/hw/ip/kmac/data/kmac.hjson b/hw/ip/kmac/data/kmac.hjson
index e55bfb1..c88e0ef 100644
--- a/hw/ip/kmac/data/kmac.hjson
+++ b/hw/ip/kmac/data/kmac.hjson
@@ -113,7 +113,7 @@
           name: "en"
           desc: "Configuration enable."
           resval: "1"
-        } // f : en 
+        } // f : en
       ]
       tags: [// This regwen is completely under HW management and thus cannot be manipulated
              // by software.
@@ -282,7 +282,7 @@
           '''
           hwaccess: "hrw"
           tags: [// Randomly write mem will cause this reg updated by design
-                 "excl:CsrNonInitTests:CsrExclCheck"]
+                 "excl:CsrAllTests:CsrExclWrite"]
         } // f: entropy_ready
         { bits: "25"
           name: err_processed