[PATCH] tpm: necessary PPC64 function exports

Some work is needed in the tpm device driver to discover the TPM out of the
device tree rather than based on set address on Power PPC.  This patch
exports a couple of functions for the parsing.

Signed-off-by: Kylene Hall <kjhall@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>