[rdk-b][mt7988][bsp][Add filogic880 BSP initial version]

[Description]
Add filogic880 BSP initial version

[Release-log]
N/A

diff --git a/conf/machine/filogic.conf b/conf/machine/filogic.conf
index 38f8ba2..938c260 100644
--- a/conf/machine/filogic.conf
+++ b/conf/machine/filogic.conf
@@ -13,11 +13,18 @@
 
 MACHINEOVERRIDES .="${@bb.utils.contains('DISTRO_FEATURES','switch_gsw_mode',':gsw','',d)}"
 
-KERNEL_DEVICETREE_gsw = " \
+KERNEL_DEVICETREE_mt7988_gsw = " \
+    mediatek/mt7988a-gsw-10g-spim-nand.dtb \
+    "
+
+KERNEL_DEVICETREE_mt7988 = " \
+    mediatek/mt7988a-dsa-10g-spim-nand.dtb \
+    "
+KERNEL_DEVICETREE_mt7986_gsw = " \
     mediatek/mt7986a-2500wan-gsw-spim-nand-rfb.dtb \
     mediatek/mt7986b-2500wan-gsw-spim-nand-rfb.dtb \
     "
-KERNEL_DEVICETREE ?= " \
+KERNEL_DEVICETREE_mt7986 = " \
     mediatek/mt7986a-spim-nand-rfb.dtb \
     mediatek/mt7986b-spim-nand-rfb.dtb \
     "