decoder/clic: Ignore CLINT interrupts in CLIC mode

Co-authored-by: Enrico Zelioli <[email protected]>

core/decoder.sv

@@ -1391,8 +1391,10 @@ module decoder import ariane_pkg::*; #(
             // -----------------
             // we decode an interrupt the same as an exception, hence it will be taken if the instruction did not
             // throw any previous exception.
-            if (ariane_pkg::RVSCLIC && clic_mode_i && clic_irq_req_i) begin
-                interrupt_cause = clic_irq_cause_i;
+            if (ariane_pkg::RVSCLIC && clic_mode_i) begin
+                if (clic_irq_req_i) begin
+                    interrupt_cause = clic_irq_cause_i;
+                end
             end else begin
                 // we have three interrupt sources: external interrupts, software interrupts, timer interrupts (order of precedence)
                 // for two privilege levels: Supervisor and Machine Mode