tpm: Add Infineon slb9635_i2c TPM driver

Add a driver for the I2C TPM from Infineon.

Signed-off-by: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Rong Chang <rongchang@chromium.org>
Signed-off-by: Tom Wai-Hong Tam <waihong@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/tpm/Makefile b/drivers/tpm/Makefile
index be11c8b..e8c159c 100644
--- a/drivers/tpm/Makefile
+++ b/drivers/tpm/Makefile
@@ -23,7 +23,11 @@
 
 LIB := $(obj)libtpm.o
 
+$(shell mkdir -p $(obj)slb9635_i2c)
+
 COBJS-$(CONFIG_GENERIC_LPC_TPM) = generic_lpc_tpm.o
+COBJS-$(CONFIG_INFINEON_TPM_I2C) += tis_i2c.o slb9635_i2c/tpm.o
+COBJS-$(CONFIG_INFINEON_TPM_I2C) += slb9635_i2c/tpm_tis_i2c.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)