nw: use board name explicitly in usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
sp: don't require board variable for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
s: don't require board variable for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
oc: don't require board variable for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
r: don't require board variable for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
h: don't require board variable for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
a: don't require board variable for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
nit6xlite: don't require board variable for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
nit6xlite: don't set serverip, ncip for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
s: don't set serverip, ncip for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
oc: don't set serverip, ncip for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
a: don't set serverip, ncip for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
h: don't set serverip, ncip for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
r: don't set serverip, ncip for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
nitrogen6x: don't set serverip, ncip for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
sp: don't set serverip, ncip for usbboot

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>