[sideload] fixed sideload if

Signed-off-by: Rasmus Madsen <rasmus.madsen@wdc.com>
diff --git a/hw/dv/sv/key_sideload_if/key_sideload_if.sv b/hw/dv/sv/key_sideload_if/key_sideload_if.sv
index e65fcf6..2e6783d 100644
--- a/hw/dv/sv/key_sideload_if/key_sideload_if.sv
+++ b/hw/dv/sv/key_sideload_if/key_sideload_if.sv
@@ -20,8 +20,8 @@
     KEY_T key;
 
     `DV_CHECK_STD_RANDOMIZE_WITH_FATAL(key, key.valid == key_valid;, , msg_id)
-    key[0] = (key_valid) ? share0 : 'hx;
-    key[1] = (key_valid) ? share1 : 'hx;
+    key.key[0] = (key_valid) ? share0 : 'hx;
+    key.key[1] = (key_valid) ? share1 : 'hx;
 
     sideload_key = key;
   endtask