drivers/i2c/tpm: use iobuf library for marshaling commands

Use the iobuf API instead of relying on own buffer management. It
also provides consistency between marshaling and unmarshaling code
paths for propagating return values instead of overloading the values
of existing variables.

BUG=b:36598499

Change-Id: Iec0bbff1312e8e6ec616d1528db8667f32e682c9
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/19063
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>

0 files changed, 0 insertions, 0 deletions