sim/config: add i2s support to nexus platform

Change-Id: I8b02811dc4df8a040b2d7dc5efd5ded9dc4a57df

platforms/nexus.repl

diff --git a/platforms/nexus.repl b/platforms/nexus.repl
index 8a33c92..8429245 100644
--- a/platforms/nexus.repl
+++ b/platforms/nexus.repl
@@ -46,6 +46,14 @@
 // DMA Ctrl          [‘h4201_0000 - ‘h4201_FFFF)  64KB DMA control interface
 // DSP Ctrl          [‘h4202_0000 - ‘h4202_FFFF)  64KB Audio DSP control interface
 
+// TOP_MATCHA_I2S0_BASE_ADDR @ top_matcha.h
+// I2S0              ['h5410_0000 - 'h5410_0040)  64B registers
+i2s0 : Sound.MatchaI2S @ sysbus 0x54100000
+    TxWatermarkIRQ -> smc_plic@39       // kTopMatchaPlicIrqIdI2s0TxWatermark @ top_matcha.h
+    RxWatermarkIRQ -> smc_plic@40       // kTopMatchaPlicIrqIdI2s0RxWatermark @ top_matcha.h
+    TxEmptyIRQ -> smc_plic@41           // kTopMatchaPlicIrqIdI2s0TxEmpty @ top_matcha.h
+    RxOverflowIRQ -> smc_plic@42        // kTopMatchaPlicIrqIdI2s0RxOverflow @ top_matcha.h
+
 ml_top_controlblock :
     HostReqIRQ -> smc_plic@33
     FinishIRQ -> smc_plic@34