tpm: Convert board config TPM options to Kconfig

Convert all TPM options to Kconfig and tidy up.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 85ff95d..b68d688 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -11,6 +11,7 @@
 CONFIG_BOOTSTAGE_REPORT=y
 CONFIG_CMD_PMIC=y
 CONFIG_CMD_REGULATOR=y
+CONFIG_CMD_TPM=y
 CONFIG_OF_CONTROL=y
 CONFIG_OF_HOSTFILE=y
 CONFIG_CLK=y
@@ -49,6 +50,7 @@
 CONFIG_DM_RTC=y
 CONFIG_SYS_VSNPRINTF=y
 CONFIG_CMD_DHRYSTONE=y
+CONFIG_TPM=y
 CONFIG_ERRNO_STR=y
 CONFIG_UNIT_TEST=y
 CONFIG_UT_TIME=y