tile: include kernel/Kconfig.freezer in tile Kconfig

Suggested by Tejun Heo <tj@kernel.org> to fix "allyesconfig"
compile failure.
Signed-off-by: NChris Metcalf <cmetcalf@tilera.com>

arch/tile/Kconfig

@@ -140,6 +140,8 @@ config ARCH_DEFCONFIG
 
 source "init/Kconfig"
 
+source "kernel/Kconfig.freezer"
+
 menu "Tilera-specific configuration"
 
 config NR_CPUS