tpm: add support for TPMv2.x SPI modules

Add the tpm2_tis_spi driver that should support any TPMv2 compliant
(SPI) module.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/tpm/Makefile b/drivers/tpm/Makefile
index e5fc86f..e4b5761 100644
--- a/drivers/tpm/Makefile
+++ b/drivers/tpm/Makefile
@@ -9,3 +9,5 @@
 obj-$(CONFIG_TPM_TIS_SANDBOX) += tpm_tis_sandbox.o
 obj-$(CONFIG_TPM_ST33ZP24_I2C) += tpm_tis_st33zp24_i2c.o
 obj-$(CONFIG_TPM_ST33ZP24_SPI) += tpm_tis_st33zp24_spi.o
+
+obj-$(CONFIG_TPM2_TIS_SPI) += tpm2_tis_spi.o