dm: tpm: sandbox: Convert TPM driver to driver model

[u-boot] / configs / M5475FFE_defconfig

CONFIG_M68K=y
CONFIG_TARGET_M5475EVB=y
CONFIG_SYS_EXTRA_OPTIONS="SYS_BUSCLK=133333333,SYS_BOOTSZ=2,SYS_DRAMSZ=64,SYS_NOR1SZ=32,SYS_VIDEO,SYS_USBCTRL,SYS_DRAMSZ1=64"
# CONFIG_CMD_SETEXPR is not set
CONFIG_SYS_PROMPT="-> "