Add TFTP input label and helper text

- Add TFTP input label and helper text for firmware page.

Signed-off-by: Suren Neware <sneware9@in.ibm.com>
Change-Id: I0f1d9f6fda9bf375449da7f8d814953628575775
diff --git a/src/locales/en-US.json b/src/locales/en-US.json
index 0015abc..830d46a 100644
--- a/src/locales/en-US.json
+++ b/src/locales/en-US.json
@@ -211,7 +211,8 @@
       "imageFileName": "Image file name",
       "onlyTarFilesAccepted": "Only .tar files accepted",
       "tftpServer": "TFTP server",
-      "tftpServerIpAddress": "TFTP server IP address",
+      "tftpServerAddress": "TFTP server address",
+      "tftpServerAddressHelper": "IP address or FQDN",
       "uploadAndRebootBmc": "Upload and reboot BMC",
       "uploadLocation": "Upload location",
       "workstation": "Workstation"