Re-add default irq and drq on acc_ss

nanosoc_tech @ 4343bd1b

-Subproject commit d9c31606eb81b404185c2ca5963a7d7f6a0d42ac
+Subproject commit 4343bd1b3321bd3c5f60f33d072ff0b78008da08

system/src/accelerator_subsystem.v

@@ -91,6 +91,10 @@ module accelerator_subsystem #(
   // Instantiate your accelerator/wrapper here
   //-------------------------------------------
 
+// Default IRQ and DMA REQ
+assign EXP_IRQ = 2'b00;
+assign EXP_DRQ = 2'b00;
+
 // Default DMA350 stream loopback
 `ifdef DMAC_DMA350
 `ifdef DMA350_STREAM_2