greybus: firmware: Add new status types for backend updated request

The specification got updated with two more status values, add their
support in greybus.

As retry isn't really an error, skip printing error messages for it as
well.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/fw-management.c

@@ -350,7 +350,8 @@ static int fw_mgmt_backend_fw_updated_operation(struct gb_operation *op)
 	fw_mgmt->backend_fw_request_id = 0;
 	fw_mgmt->backend_fw_status = request->status;
 
-	if (fw_mgmt->backend_fw_status != GB_FW_BACKEND_FW_STATUS_SUCCESS)
+	if ((fw_mgmt->backend_fw_status != GB_FW_BACKEND_FW_STATUS_SUCCESS) &&
+	    (fw_mgmt->backend_fw_status != GB_FW_BACKEND_FW_STATUS_RETRY))
 		dev_err(fw_mgmt->parent,
 			"failed to load backend firmware: %02x\n",
 			fw_mgmt->backend_fw_status);

drivers/staging/greybus/greybus_protocols.h

@@ -367,6 +367,8 @@ struct gb_fw_download_release_firmware_request {
 #define GB_FW_BACKEND_FW_STATUS_FAIL_FETCH	0x03
 #define GB_FW_BACKEND_FW_STATUS_FAIL_WRITE	0x04
 #define GB_FW_BACKEND_FW_STATUS_INT		0x05
+#define GB_FW_BACKEND_FW_STATUS_RETRY		0x06
+#define GB_FW_BACKEND_FW_STATUS_NOT_SUPPORTED	0x07
 
 /* firmware management interface firmware version request has no payload */
 struct gb_fw_mgmt_interface_fw_version_response {