tpm, tpm_crb: ioremap() command and response buffer

ioremap() command and response buffers in the driver initialization
because they could reside in theory anywhere.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
tpm, tpm_crb: use io access functions

It's not portable to access IO memory directly. This patch wraps
IO access to the helper functions.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>