tpm: Remove read16/read32/write32 calls from tpm_tis_phy_ops

Only tpm_tis and tpm_tis_synquacer have a dedicated way to access
multiple bytes at once, every other driver will just fall back to
read_bytes/write_bytes. Therefore, remove the read16/read32/write32
calls and move their logic to read_bytes/write_bytes.

Suggested-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Johannes Holland <johannes.holland@infineon.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>