mainboard/google/poppy: Add support for cr50 SPI TPM

Put all configs required for enabling cr50 SPI TPM on poppy under
POPPY_USE_SPI_TPM so that it can be enabled any time for testing SPI
TPM on this board.

Also, add required callback for irq status and devicetree config for
GSPI0.

BUG=b:36873582

Change-Id: I67793093c006c1325fc16f669a96126525f83243
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/19238
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
3 files changed