[prim] Add missing include to prim_mubi_dec* Signed-off-by: Rupert Swarbrick <rswarbrick@lowrisc.org>

diff --git a/hw/ip/prim/rtl/prim_mubi12_dec.sv b/hw/ip/prim/rtl/prim_mubi12_dec.sv
index 1bc237e..7848213 100644
--- a/hw/ip/prim/rtl/prim_mubi12_dec.sv
+++ b/hw/ip/prim/rtl/prim_mubi12_dec.sv

@@ -9,6 +9,8 @@
 //
 // Decoder for multibit control signals with additional input buffers.
 
+`include "prim_assert.sv"
+
 module prim_mubi12_dec
   import prim_mubi_pkg::*;
 #(

diff --git a/hw/ip/prim/rtl/prim_mubi16_dec.sv b/hw/ip/prim/rtl/prim_mubi16_dec.sv
index 6b6aaa0..2a93fbb 100644
--- a/hw/ip/prim/rtl/prim_mubi16_dec.sv
+++ b/hw/ip/prim/rtl/prim_mubi16_dec.sv

@@ -9,6 +9,8 @@
 //
 // Decoder for multibit control signals with additional input buffers.
 
+`include "prim_assert.sv"
+
 module prim_mubi16_dec
   import prim_mubi_pkg::*;
 #(

diff --git a/hw/ip/prim/rtl/prim_mubi4_dec.sv b/hw/ip/prim/rtl/prim_mubi4_dec.sv
index a17620b..e48736c 100644
--- a/hw/ip/prim/rtl/prim_mubi4_dec.sv
+++ b/hw/ip/prim/rtl/prim_mubi4_dec.sv

@@ -9,6 +9,8 @@
 //
 // Decoder for multibit control signals with additional input buffers.
 
+`include "prim_assert.sv"
+
 module prim_mubi4_dec
   import prim_mubi_pkg::*;
 #(

diff --git a/hw/ip/prim/rtl/prim_mubi8_dec.sv b/hw/ip/prim/rtl/prim_mubi8_dec.sv
index 9dbf95e..38f6352 100644
--- a/hw/ip/prim/rtl/prim_mubi8_dec.sv
+++ b/hw/ip/prim/rtl/prim_mubi8_dec.sv

@@ -9,6 +9,8 @@
 //
 // Decoder for multibit control signals with additional input buffers.
 
+`include "prim_assert.sv"
+
 module prim_mubi8_dec
   import prim_mubi_pkg::*;
 #(

diff --git a/util/design/data/prim_mubi_dec.sv.tpl b/util/design/data/prim_mubi_dec.sv.tpl
index 8f698dd..a3609c8 100644
--- a/util/design/data/prim_mubi_dec.sv.tpl
+++ b/util/design/data/prim_mubi_dec.sv.tpl

@@ -9,6 +9,8 @@
 //
 // Decoder for multibit control signals with additional input buffers.
 
+`include "prim_assert.sv"
+
 module prim_mubi${n_bits}_dec
   import prim_mubi_pkg::*;
 #(