dm: tpm: Move tpm_tis_i2c to tpm_i2c_infineon

As there is no TCG specification or recommendation for i2c TPM 1.2,
move tpm_tis_i2c driver to tpm_i2c_infineon. Other tpm vendors like Atmel
or STMicroelectronics may have a different transport protocol for i2c.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/README b/README
index d18df54..63bdeb9 100644
--- a/README
+++ b/README
@@ -1472,8 +1472,8 @@
 		CONFIG_TPM
 		Support TPM devices.
 
-		CONFIG_TPM_TIS_I2C
-		Support for i2c bus TPM devices. Only one device
+		CONFIG_TPM_TIS_INFINEON
+		Support for Infineon i2c bus TPM devices. Only one device
 		per system is supported at this time.
 
 			CONFIG_TPM_TIS_I2C_BURST_LIMITATION