tpm/tpm_i2c_stm_st33: Replace access to io_lpcpd from struct st33zp24_platform_data to tpm_stm_dev

io_lpcpd is accessible from struct tpm_stm_dev.
struct st33zp24_platform_data is only valid when using static platform
configuration data, not when using dts.

Reviewed-by: Jason Gunthorpe <jason.gunthorpe@obsidianresearch.com>
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>