Build TPM passthrough for i386 and x86_64 targets

Build the TPM passthrough driver only for i386 and x86_64 targets
using the default-configs files for those targets with softmmu.
Signed-off-by: NStefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: NCorey Bryant <coreyb@linux.vnet.ibm.com>
Reviewed-by: NJoel Schopp <jschopp@linux.vnet.ibm.com>
Message-id: 1361987275-26289-8-git-send-email-stefanb@linux.vnet.ibm.com
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

default-configs/i386-softmmu.mak

@@ -27,3 +27,4 @@ CONFIG_APPLESMC=y
 CONFIG_I8259=y
 CONFIG_PFLASH_CFI01=y
 CONFIG_TPM_TIS=y
+CONFIG_TPM_PASSTHROUGH=y

default-configs/x86_64-softmmu.mak

@@ -27,3 +27,4 @@ CONFIG_APPLESMC=y
 CONFIG_I8259=y
 CONFIG_PFLASH_CFI01=y
 CONFIG_TPM_TIS=y
+CONFIG_TPM_PASSTHROUGH=y