kconfig: add missing SPI TPM CS config definition

To fully define TPM attachment to a SPI interface both bus and CS
(chip select) settings are required. Add the missing CS configuration
option.

BRANCH=none
BUG=chrome-os-partner:50645
TEST=with the rest of the patches applied it is possible to compile in
     and run TPM2 SPI driver.

Change-Id: If297df8e5b9526f156ed1414eb9db317d6af5b33
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/353913
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15299
Tested-by: build bot (Jenkins)
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

0 files changed, 0 insertions, 0 deletions