src: Update bare access to BOOL CONFIG_ vals to CONFIG()

BOOL type Kconfig values should be used through the CONFIG() macro.
These instances were not, so update them.

Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: Ie4706d82c12c487607bbf5ad8059922e0e586858
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43825
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/drivers/spi/tpm/tpm.c

@@ -44,7 +44,7 @@ static struct tpm2_info tpm_info;
  * TODO(vbendeb): make CONFIG(DEBUG_TPM) an int to allow different level of
  * debug traces. Right now it is either 0 or 1.
  */
-static const int debug_level_ = CONFIG_DEBUG_TPM;
+static const int debug_level_ = CONFIG(DEBUG_TPM);
 
 /*
  * SPI frame header for TPM transactions is 4 bytes in size, it is described