purism/librem_skl: remove 13v3 target, clean up Kconfig

Remove the Librem 13v3 as a separate board; instead build a
single firmware image for the 13 v2/v3 boards.

Clean up Kconfig options:
- remove entries for 13v3 board
- fold entries into a single line where possible
- remove redundant MAINBOARD_VERSION option (will default to 1.0)
- remove unused microcode length/location (only needed for FSP CAR)

Test: build/boot Librem 13 v2/v3 boards with same image

Change-Id: Ic09b8ec5c576f4c4c48ef30ee3f60a4c2c286cd3
Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32515
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

0 files changed, 0 insertions, 0 deletions