Fix HIOMAP window reset on chassis power down

main.c

@@ -1150,6 +1150,14 @@ static void run_post_shutdown_bmc_peripheral_teardown(void)
 	// Disable LPC slave IRQs
 	set_lpc_slave_irq_enable(0);
 
+	// Reset HIOMAP windows
+	hiomap_config.protocol_version = 0;
+	hiomap_config.window_start_address = 0;
+	hiomap_config.window_length_bytes = FLASH_SIZE_BYTES;
+	hiomap_config.active_device_id = 0;
+	hiomap_config.window_type = HIOMAP_WINDOW_TYPE_READ;
+	hiomap_config.dirty_range_count = 0;
+
 	// Reset POST codes and display
 	post_code_high = 0;
 	post_code_low = 0;