ec/google/chromeec: don't put empty block in SSDT

Check that there are actually USB-PD ports for which to
add data to SSDT, before actually generating SSDT data.
This prevents an empty scope from being generated on
devices without any USB-PD ports, which was breaking
parsing/decompilation on some older platforms (eg,
Braswell).

Test: build/boot google/edgar, verify SSDT table able to
be parsed via iasl after dumping.

Change-Id: Ia213e5815e9160e9b36b2501eeccb6385abef47e
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39665
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions