[PATCH] tpm: use ioread8 and iowrite8

Use ioread8 and iowrite8 as suggested.

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>