tpm2: tis_spi: add linux compatible fallback string

This solves a compatibility issue with Linux device trees
that contain TPMv2.x hardware. So it's easier to import DTS
from upstream kernel when migrating board init from C code
to DTS.

The issue is that fallback binding is different between Linux
and u-Boot.

Linux: "tcg,tpm_tis-spi"
U-Boot: "tis,tpm2-spi"

As there are currently no in-tree users of the U-Boot binding,
it makes sense to use Linux fallback binding.

Signed-off-by: Bruno Thomsen <bruno.thomsen@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/tpm/tpm2_tis_spi.c b/drivers/tpm/tpm2_tis_spi.c
index 36016de..9a8145e 100644
--- a/drivers/tpm/tpm2_tis_spi.c
+++ b/drivers/tpm/tpm2_tis_spi.c
@@ -676,7 +676,7 @@
 
 static const struct udevice_id tpm_tis_spi_ids[] = {
 	{
-		.compatible = "tis,tpm2-spi",
+		.compatible = "tcg,tpm_tis-spi",
 		.data = (ulong)&tpm_tis_std_chip_data,
 	},
 	{ }