purism/librem_bdw: Rename Broadwell baseboard from BDL to BDW

My bad, it seems the acronym for Broadwell is BDW, and not BDL, so
I'm renaming librem_bdl into librem_bdw and changing the KConfig
options accordingly.

Change-Id: I8e992aa3474863236adf8893fcbe37c1b801fa25
Signed-off-by: Youness Alaoui <youness.alaoui@puri.sm>
Reviewed-on: https://review.coreboot.org/26237
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
21 files changed