ARM64: bcm2835: add thermal driver to default config

Add the thermal driver for bcm2837 to list of compiled modules
in the default config.

Changelog:
 V7 -> V8: rebased
Signed-off-by: NMartin Sperl <kernel@martin.sperl.org>
Signed-off-by: NEric Anholt <eric@anholt.net>

arch/arm64/configs/defconfig

@@ -271,6 +271,7 @@ CONFIG_THERMAL=y
 CONFIG_THERMAL_EMULATION=y
 CONFIG_THERMAL_GOV_POWER_ALLOCATOR=y
 CONFIG_CPU_THERMAL=y
+CONFIG_BCM2835_THERMAL=y
 CONFIG_EXYNOS_THERMAL=y
 CONFIG_WATCHDOG=y
 CONFIG_RENESAS_WDT=y