tpm: Split TPM2 sysfs attribute caps

Replace caps with two attributes:

- manufacturer in 0x08%x format
- firmware1.firmware2 in 0x08%x.0x08%x format

This makes them better aligned how sysfs attributes should be and
machine readable.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>