tpm: Remove unintentional dump_stack() call

Somewhere along the line, probably during a rebase, an unintentional
dump_stack() got included. Revert this change.

Reported-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Fixes: 90cba8d2

 ("tpm/ppi: Constify static struct attribute_group")
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>