greybus: interface: Receive serial-number on hotplug event

Two exactly same modules can be uniquely identified using module's
serial-number. This patch updates the interface hotplug event to also
receive the serial-number of the module.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
diff --git a/drivers/staging/greybus/svc.c b/drivers/staging/greybus/svc.c
index 4178699..fe7bd28 100644
--- a/drivers/staging/greybus/svc.c
+++ b/drivers/staging/greybus/svc.c
@@ -429,6 +429,7 @@
 	intf->ddbl1_product_id = le32_to_cpu(request->data.ddbl1_prod_id);
 	intf->vendor_id = le32_to_cpu(request->data.ara_vend_id);
 	intf->product_id = le32_to_cpu(request->data.ara_prod_id);
+	intf->serial_number = le64_to_cpu(request->data.serial_number);
 
 	ret = gb_svc_read_and_clear_module_boot_status(intf);
 	if (ret) {