pciexp_device: Fix offset handling for extended capabilities

The PCIe spec explicitly states that the bottom-two bits of the next
offset are reserved for future use and should be masked. We can also
change the loop condition to avoid wrong offsets below 0x100 (exten-
ded capabilities always reside in the extended config space).

The whole patch series was tested on Google Samus and keeps the L1ss
configuration of the WiFi device in tact.

Change-Id: I0b622a0ce0a4a1127d266226ade0ec1e66e9fb79
Signed-off-by: Nico Huber <nico.h@gmx.de>
Tested-by: Patrick Georgi <patrick@coreboot.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66459
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions