Move TPM code out of chromeos

This code is not specific to ChromeOS and is useful outside of it.
Like with small modifications it can be used to disable TPM altogether.

Change-Id: I8c6baf0a1f7c67141f30101a132ea039b0d09819
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/10269
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/include/tpm.h

@@ -66,4 +66,6 @@ int tis_close(void);
 int tis_sendrecv(const u8 *sendbuf, size_t send_size, u8 *recvbuf,
 			size_t *recv_len);
 
+void init_tpm(int s3resume);
+
 #endif /* TPM_H_ */