drivers/i2c/tpm/cr50.c: Check if TPM was read

Under some conditions, cr50_i2c_read() can return without actually reading
the TPM, which will leave access uninitialized. Set an initial value for
access, and if TPM fails to respond in time check if at least TPM was read.
This way avoids printing an uninitialized value.

BUG=b:112253891
TEST=Build and boot grunt.

Change-Id: I5ec7a99396db32971dc8485b77158d735ab1d788
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/27995
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

0 files changed, 0 insertions, 0 deletions