Cr50: Cleanup TPM debug messages
Cr50: Cleanup TPM debug messages

This changes how tpm_register_put() debug messages are displayed
to show only the bytes that are sent instead of some
uninitialized bytes as well.

BUG=none
BRANCH=none
TEST=make buildall; run on Cr50 hardware

On the console, run

  chan -1

to enable displaying the debug output.

Before this CL, you'd see messages like this:

  tpm_register_put(0x024, 21 180)
  tpm_register_put(0x024, 1 17f)
  tpm_register_put(0x018, 1 120)
  tpm_register_put(0x018, 1 140)

Afterwards, you'd see accurate messages:

  tpm_register_put(0x024, 21, 80 01 00 00 ...)
  tpm_register_put(0x024, 1, 01)
  tpm_register_put(0x018, 1, 20)
  tpm_register_put(0x018, 1, 40)

Change-Id: Iad798804a4b6060e9bfafad50c90138eb1144c8f
Signed-off-by: Bill Richardson <129945214b1d548d8e49b6c29c43094f8c78057f@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/382664
Reviewed-by: Vadim Bendebury <5515d6d2d0829cbe0dd0dcf2094aaded06d58514@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec