TCXB6-6489 : CM TFTP server shows incorrect value on the GUI page
TCXB6-6489 : CM TFTP server shows incorrect value on the GUI page

Reason for change: In "dual stack" mode, if there is no IPv4 tftp server address,
HAL will return Value = 0 and cm_hal_GetIPv6DHCPInfo will get called to
get IPv6 tftp address.
Test Procedure:
1.Upgraded the unit with latest NG build.
2.Make sure CM is configured in dual mode.
3.Login to admin/mso page.
4.Gateway > Connection > XFINITY Network
5.CM TFTP Server should be displayed correctly.
Risks: None
Signed-off-by: Swapnil Samrit <swapnil_samrit@comcast.com>

(cherry picked from commit 0d1c984e0af019515d81794032cb7ac434ff536a)

Change-Id: Id3d20d4e1f279b1de7beff289e44ead592864100

rdkcmf/rdkb-webui,rdkcmf/rdkb-webui,rdkcmf/rdkb-webui,rdkcmf/rdkb-webui,rdkcmf/rdkb-webui