kernel: add missing TPM related config symbol for 3.18

Signed-off-by: Felix Fietkau <[email protected]>

target/linux/generic/config-3.18

@@ -3890,6 +3890,7 @@ CONFIG_SYSVIPC_SYSCTL=y
 # CONFIG_TCG_TIS_I2C_INFINEON is not set
 # CONFIG_TCG_TIS_I2C_NUVOTON is not set
 # CONFIG_TCG_ATMEL is not set
+# CONFIG_TCG_ST33_I2C is not set
 # CONFIG_TCG_TIS_ST33ZP24 is not set
 # CONFIG_TCIC is not set
 CONFIG_TCP_CONG_ADVANCED=y