d2spr: add support for d2tfnspr

* SCH-S960L - This is the Net 10/Straight Talk SGS3
* Uses Sprint bands for data, so we'll piggy-back here

Change-Id: I181d820a575ac1576e547160be0656d905144810

Conflicts:
	BoardConfig.mk
add L710VPUCMK3 as valid bootloader

Change-Id: Ibb901a8d20e37c81961221990788368cb1b177b2