arm: dts: kirkwood: Remove DTS files for Kirkwood boards

Remove DTS and DTSI files for Kirkwood boards that have upstream supports.

This patch depends on
"arm: dts: kirkwood: Enable upstream DT on Kirkwood boards"
https://patchwork.ozlabs.org/project/uboot/patch/20240322021747.14873-1-mibodhi@gmail.com/

Signed-off-by: Tony Dinh <mibodhi@gmail.com>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 7b7788f..27a1003 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -47,33 +47,7 @@
 
 dtb-$(CONFIG_ARCH_KIRKWOOD) += \
 	kirkwood-atl-sbx81lifkw.dtb \
-	kirkwood-atl-sbx81lifxcat.dtb \
-	kirkwood-blackarmor-nas220.dtb \
-	kirkwood-d2net.dtb \
-	kirkwood-dns325.dtb \
-	kirkwood-dockstar.dtb \
-	kirkwood-dreamplug.dtb \
-	kirkwood-ds109.dtb \
-	kirkwood-goflexnet.dtb \
-	kirkwood-guruplug-server-plus.dtb \
-	kirkwood-ib62x0.dtb \
-	kirkwood-iconnect.dtb \
-	kirkwood-is2.dtb \
-	kirkwood-lsxhl.dtb \
-	kirkwood-lschlv2.dtb \
-	kirkwood-net2big.dtb \
-	kirkwood-ns2.dtb \
-	kirkwood-ns2lite.dtb \
-	kirkwood-ns2max.dtb \
-	kirkwood-ns2mini.dtb \
-	kirkwood-nsa310s.dtb \
-	kirkwood-nsa325.dtb \
-	kirkwood-openrd-base.dtb \
-	kirkwood-openrd-client.dtb \
-	kirkwood-openrd-ultimate.dtb \
-	kirkwood-pogo_e02.dtb \
-	kirkwood-pogoplug-series-4.dtb \
-	kirkwood-sheevaplug.dtb
+	kirkwood-atl-sbx81lifxcat.dtb
 
 dtb-$(CONFIG_MACH_S900) += \
 	bubblegum_96.dtb