bcm53xx: enable Northstar thermal driver

It allows monitoring CPU temp and will shutdown system on critical
value.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

target/linux/bcm53xx/config-4.4

@@ -71,6 +71,7 @@ CONFIG_BCMA_HOST_PCI_POSSIBLE=y
 CONFIG_BCMA_HOST_SOC=y
 CONFIG_BCMA_SFLASH=y
 CONFIG_BCM_NET_PHYLIB=y
+CONFIG_BCM_NS_THERMAL=y
 CONFIG_BGMAC=y
 CONFIG_BGMAC_BCMA=y
 # CONFIG_BGMAC_PLATFORM is not set
@@ -312,6 +313,10 @@ CONFIG_SWCONFIG_B53_SRAB_DRIVER=y
 CONFIG_SWIOTLB=y
 CONFIG_SWP_EMULATE=y
 CONFIG_SYS_SUPPORTS_APM_EMULATION=y
+CONFIG_THERMAL=y
+CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE=y
+CONFIG_THERMAL_GOV_STEP_WISE=y
+CONFIG_THERMAL_OF=y
 # CONFIG_THUMB2_KERNEL is not set
 CONFIG_TICK_CPU_ACCOUNTING=y
 CONFIG_TREE_RCU=y

target/linux/bcm53xx/config-4.9

@@ -64,6 +64,7 @@ CONFIG_BCMA_HOST_PCI_POSSIBLE=y
 CONFIG_BCMA_HOST_SOC=y
 CONFIG_BCMA_SFLASH=y
 CONFIG_BCM_NET_PHYLIB=y
+CONFIG_BCM_NS_THERMAL=y
 CONFIG_BGMAC=y
 CONFIG_BGMAC_BCMA=y
 # CONFIG_BGMAC_PLATFORM is not set
@@ -313,6 +314,10 @@ CONFIG_SWIOTLB=y
 CONFIG_SWPHY=y
 CONFIG_SWP_EMULATE=y
 CONFIG_SYS_SUPPORTS_APM_EMULATION=y
+CONFIG_THERMAL=y
+CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE=y
+CONFIG_THERMAL_GOV_STEP_WISE=y
+CONFIG_THERMAL_OF=y
 # CONFIG_THUMB2_KERNEL is not set
 CONFIG_TICK_CPU_ACCOUNTING=y
 CONFIG_TREE_RCU=y