Now that we can have multiple .c files in the tpm module there is
no reason for tpm-bios.
tpm-bios exported several functions: tpm_bios_log_setup,
tpm_bios_log_teardown, tpm_add_ppi, and tpm_remove_ppi.
They are only used by tpm, and if tpm-bios is built then
tpm will unconditionally require them. Further, tpm-bios does
nothing on its own, it has no module_init function.
Thus we remove the exports and merge the modules to simplify things.
The Makefile conditions are changed slightly to match the code,
tpm_ppi is always required if CONFIG_ACPI is set.
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
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