kernel: other.mk: add thermal option

It is available in later kernel versions.

Signed-off-by: Luka Perkov <luka@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40752 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/kernel/linux/modules/other.mk

@@ -830,6 +830,7 @@ define KernelPackage/thermal
   HIDDEN:=1
   KCONFIG:= \
 	CONFIG_THERMAL \
+	CONFIG_THERMAL_OF=y \
 	CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE=y \
 	CONFIG_THERMAL_DEFAULT_GOV_FAIR_SHARE=n \
 	CONFIG_THERMAL_DEFAULT_GOV_USER_SPACE=n \