mb/*/romstage: Don't lock ETR3 CF9GR in early romstage

Do not lock ETR3 CF9GR in early romstage.
As of Change-Id: I2cb30267a6342db1f3b11715034219ffb18ca678 this is done
in bd82x6x's finalize handler.

Change-Id: Iea091511f0d2a6128d3a19e9413090c85e4c2e57
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/19570
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
12 files changed