phycore-imx8mp_defconfig: Enable CONFIG_IMX_TMU

Enable the imx thermal driver to prevent booting when the system is too
hot.

Signed-off-by: Benjamin Hahn <B.Hahn@phytec.de>
diff --git a/configs/phycore-imx8mp_defconfig b/configs/phycore-imx8mp_defconfig
index 0f37286..c955542 100644
--- a/configs/phycore-imx8mp_defconfig
+++ b/configs/phycore-imx8mp_defconfig
@@ -138,6 +138,7 @@
 CONFIG_SYSRESET_PSCI=y
 CONFIG_SYSRESET_WATCHDOG=y
 CONFIG_DM_THERMAL=y
+CONFIG_IMX_TMU=y
 CONFIG_USB=y
 CONFIG_DM_USB_GADGET=y
 CONFIG_USB_XHCI_HCD=y