[][openwrt][mt7988][integration][Add basic Filogic 880 SoC support]

[Description]
Add basic filogic 880 SoC support to openwrt 21.02

[Release-log]

Change-Id: I57791df2e9f9f4729cb2d32f734090de52c370f2
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6592143
Build: srv_hbgsm110
diff --git a/target/linux/mediatek/patches-5.4/6001-mtk-thermal-add-lvts-support.patch b/target/linux/mediatek/patches-5.4/6001-mtk-thermal-add-lvts-support.patch
new file mode 100644
index 0000000..1591144
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/6001-mtk-thermal-add-lvts-support.patch
@@ -0,0 +1,28 @@
+diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
+index 001a21ab..67d3da48 100644
+--- a/drivers/thermal/Kconfig
++++ b/drivers/thermal/Kconfig
+@@ -348,6 +348,11 @@ config MTK_THERMAL
+ 	  Enable this option if you want to have support for thermal management
+ 	  controller present in Mediatek SoCs
+ 
++menu "Mediatek thermal drivers"
++depends on ARCH_MEDIATEK || COMPILE_TEST
++source "drivers/thermal/mediatek/Kconfig"
++endmenu
++
+ menu "Intel thermal drivers"
+ depends on X86 || X86_INTEL_QUARK || COMPILE_TEST
+ source "drivers/thermal/intel/Kconfig"
+diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
+index 74a37c7f..6be9ff19 100644
+--- a/drivers/thermal/Makefile
++++ b/drivers/thermal/Makefile
+@@ -51,6 +51,7 @@ obj-$(CONFIG_QCOM_TSENS)	+= qcom/
+ obj-y				+= tegra/
+ obj-$(CONFIG_HISI_THERMAL)     += hisi_thermal.o
+ obj-$(CONFIG_MTK_THERMAL)	+= mtk_thermal.o
++obj-y				+= mediatek/
+ obj-$(CONFIG_GENERIC_ADC_THERMAL)	+= thermal-generic-adc.o
+ obj-$(CONFIG_ZX2967_THERMAL)	+= zx2967_thermal.o
+ obj-$(CONFIG_UNIPHIER_THERMAL)	+= uniphier_thermal.o