[keymgr] Enable non-linear lfsr outputs

Signed-off-by: Timothy Chen <timothytim@google.com>
diff --git a/hw/ip/keymgr/rtl/keymgr.sv b/hw/ip/keymgr/rtl/keymgr.sv
index 9efa96f..43a19f1 100644
--- a/hw/ip/keymgr/rtl/keymgr.sv
+++ b/hw/ip/keymgr/rtl/keymgr.sv
@@ -156,7 +156,8 @@
     .StateOutDw(LfsrWidth),
     .DefaultSeed(RndCnstLfsrSeed),
     .StatePermEn(1'b1),
-    .StatePerm(RndCnstLfsrPerm)
+    .StatePerm(RndCnstLfsrPerm),
+    .NonLinearOut(1'b1)
   ) u_lfsr (
     .clk_i,
     .rst_ni,