board: cssi: add support for reading temperature

All CSSI boards have an LM74 chip as temperature sensor.

Enable it.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
diff --git a/configs/CMPCPRO_defconfig b/configs/CMPCPRO_defconfig
index cefed63..f8f5c9f 100644
--- a/configs/CMPCPRO_defconfig
+++ b/configs/CMPCPRO_defconfig
@@ -134,6 +134,7 @@
 # CONFIG_CMD_LOADS is not set
 CONFIG_CMD_MTD=y
 CONFIG_CMD_NAND=y
+CONFIG_CMD_TEMPERATURE=y
 CONFIG_CMD_DHCP=y
 CONFIG_BOOTP_BOOTFILESIZE=y
 CONFIG_CMD_MII=y
@@ -197,6 +198,8 @@
 CONFIG_MPC8XXX_SPI=y
 CONFIG_SYSRESET=y
 CONFIG_SYSRESET_MPC83XX=y
+CONFIG_DM_THERMAL=y
+CONFIG_TI_LM74_THERMAL=y
 CONFIG_WDT=y
 CONFIG_WDT_MPC8xxx=y
 # CONFIG_REGEX is not set