[aon_timer/lint] Minor lint fixes

Signed-off-by: Tom Roberts <tomroberts@lowrisc.org>
diff --git a/hw/ip/aon_timer/aon_timer.core b/hw/ip/aon_timer/aon_timer.core
index e7abcb0..487eaa4 100644
--- a/hw/ip/aon_timer/aon_timer.core
+++ b/hw/ip/aon_timer/aon_timer.core
@@ -22,12 +22,18 @@
       # common waivers
       - lowrisc:lint:common
       - lowrisc:lint:comportable
+    files:
+      - lint/aon_timer.vlt
+    file_type: vlt
 
   files_ascentlint_waiver:
     depend:
       # common waivers
       - lowrisc:lint:common
       - lowrisc:lint:comportable
+    files:
+      - lint/aon_timer.waiver
+    file_type: waiver
 
   files_veriblelint_waiver:
     depend:
diff --git a/hw/ip/aon_timer/rtl/aon_timer.sv b/hw/ip/aon_timer/rtl/aon_timer.sv
index 1435bb6..61d772b 100644
--- a/hw/ip/aon_timer/rtl/aon_timer.sv
+++ b/hw/ip/aon_timer/rtl/aon_timer.sv
@@ -36,7 +36,7 @@
   // Register structs
   aon_timer_reg2hw_t         reg2hw;
   aon_timer_hw2reg_t         hw2reg, aon_hw2reg, hw2reg_sync;
-  logic [1:0]                unused_intr_state_bits;
+  logic                      unused_intr_state_bits;
   // Register read signals
   logic                      wkup_enable;
   logic [11:0]               wkup_prescaler;
@@ -116,7 +116,7 @@
   assign hw2reg.wdog_bite_thold.d          = hw2reg_sync.wdog_bite_thold.d;
   assign hw2reg.wdog_count.d               = hw2reg_sync.wdog_count.d;
   assign hw2reg.wkup_cause.d               = hw2reg_sync.wkup_cause.d;
-  assign unused_intr_state_bits            = hw2reg_sync.intr_state;
+  assign unused_intr_state_bits            = &{1'b0, hw2reg_sync.intr_state};
 
   //////////////////////////////
   // Register Write Interface //