[M] Change in coreboot[master]: security/tpm: replace CONFIG(TPMx) checks with runtime check

[Julius Werner (Code Review)]

Attention is currently required from: Christian Walter, Krystian Hebel, Lance Zhao, Martin L Roth, Michał Żygowski, Sergii Dmytruk, Tim Wawrzynczak.

Julius Werner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/69161?usp=email )

Change subject: security/tpm: replace CONFIG(TPMx) checks with runtime check
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Patch Set 13:

(1 comment)

File src/security/tpm/tss/tss.c:

https://review.coreboot.org/c/coreboot/+/69161/comment/d1f2c95d_6be37ec2 :
PS13, Line 48: 	return family;
> Doing this strictly at runtime adds code to the build and lengthens the boot time by probing. […]

Yeah, we definitely need to make sure everything else optimizes out when only one of the two is enabled. I think a static inline in the header file should work:
```
static inline enum tpm_family tlcl_get_family(void)
{
  if (CONFIG(TPM1) && CONFIG(TPM2)) {
    extern enum tpm_family tlcl_tpm_family;
    return tlcl_tpm_family;
  } else if (CONFIG(TPM1)) {
    return TPM_1;
  } else if (CONFIG(TPM2)) {
    return TPM_2;
  }
  return TPM_UNKNOWN;
}
```