security/tpm: Improve TCPA log generation

* Make tcpa_log_init static and move init code into
the tcpa_log_add_table_entry routine.
* Add more checks for log initialization.
* Fix minor issues

Change-Id: I215d79eed7ad17c6ab87f0c4b14a282e519ef07d
Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org>
Reviewed-on: https://review.coreboot.org/27769
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/tpm/tpm.c

@@ -30,9 +30,6 @@ static void init_tpm_dev(void *unused)
 #else
 	tpm_setup(false);
 #endif
-
-	// TCPA cbmem log
-	tcpa_log_init();
 }
 
 BOOT_STATE_INIT_ENTRY(BS_DEV_INIT, BS_ON_ENTRY, init_tpm_dev, NULL);