d2lte: add d2tfnspr and d2spi

d2spi does not need a separate section in props because the bootloader
string, SCH-L710, matches what we look for for d2spr, SPH-L710

Change-Id: Icb3300bb026ebfb70cedfe312d4cc26b16dfd222

Conflicts:
	BoardConfig.mk
	init/init_d2lte.c