I2S RX Fix Missing Else Statement

I2S RX fix missing else statement syntax error

Change-Id: I6b435bea2ad6c9648b234a743e90d5dd05df8978

hw/top_matcha/ip/i2s/rtl/i2s_rx.sv

diff --git a/hw/top_matcha/ip/i2s/rtl/i2s_rx.sv b/hw/top_matcha/ip/i2s/rtl/i2s_rx.sv
index 74ad7a3..d62b762 100644
--- a/hw/top_matcha/ip/i2s/rtl/i2s_rx.sv
+++ b/hw/top_matcha/ip/i2s/rtl/i2s_rx.sv
@@ -88,12 +88,13 @@
     end
   end
 
-  // Bits were clocked on the line falling edge of clock. Latch data in on rising.
+  // Clock in  data in on rising edge.
   always_ff @(posedge sclk_o or negedge rst_ni) begin
     if (!rst_ni) begin
       shift_reg <= '0;
+    end else begin
+      shift_reg <= {shift_reg[WordWidth-2:0], serial_data_i};
     end
-    shift_reg <= {shift_reg[WordWidth-2:0], serial_data_i};
   end
 
 endmodule