tpm: fix raciness of PPI interface lookup
Traversal of the ACPI device tree was not done right. PPI interface should be looked up only from the ACPI device that is the platform device for the TPM. This could cause problems with systems with two TPM chips such as 4th gen Intel systems. In addition, added the missing license and copyright platter to the tpm_ppi.c. Signed-off-by: NJarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: NJasob Gunthorpe <jason.gunthorpe@obsidianresearch.com> Reviewed-by: NStefan Berger <stefanb@linux.vnet.ibm.com> Tested-by: NScot Doyle <lkml14@scotdoyle.com> Signed-off-by: NPeter Huewe <peterhuewe@gmx.de>
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