[][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-5.4/0006-powerdomain-add-mt7988-support.patch b/target/linux/mediatek/patches-5.4/0006-powerdomain-add-mt7988-support.patch
new file mode 100644
index 0000000..7fc4f1d
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/0006-powerdomain-add-mt7988-support.patch
@@ -0,0 +1,9 @@
+diff --git a/drivers/soc/mediatek/Makefile b/drivers/soc/mediatek/Makefile
+index b017330..1c485e3 100644
+--- a/drivers/soc/mediatek/Makefile
++++ b/drivers/soc/mediatek/Makefile
+@@ -3,3 +3,4 @@ obj-$(CONFIG_MTK_CMDQ) += mtk-cmdq-helper.o
+ obj-$(CONFIG_MTK_INFRACFG) += mtk-infracfg.o
+ obj-$(CONFIG_MTK_PMIC_WRAP) += mtk-pmic-wrap.o
+ obj-$(CONFIG_MTK_SCPSYS) += mtk-scpsys.o
++obj-$(CONFIG_MTK_SCPSYS) += mtk-pm-domains.o