BananaPi BPI-F3: add overlay support

Signed-off-by: Patrick Yavitz <pyavitz@gmail.com>

patch/kernel/archive/spacemit-6.6/006-overlay-support.patch

@@ -0,0 +1,56 @@
+From 8c8c784cdfa44a0c1738ddd1f790421787848131 Mon Sep 17 00:00:00 2001
+From: Patrick Yavitz <pyavitz@gmail.com>
+Date: Sat, 15 Feb 2025 12:44:54 -0500
+Subject: [PATCH] overlay support
+
+Signed-off-by: Patrick Yavitz <pyavitz@gmail.com>
+---
+ scripts/Makefile.lib | 18 ++++++++++++++++++
+ 1 file changed, 18 insertions(+)
+
+diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
+index 44f20b1b853a..22166f3bb4fe 100644
+--- a/scripts/Makefile.lib
++++ b/scripts/Makefile.lib
+@@ -348,6 +348,7 @@ ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
+ DTC_FLAGS += -Wno-unit_address_vs_reg \
+ 	-Wno-avoid_unnecessary_addr_size \
+ 	-Wno-alias_paths \
++	-Wno-gpios_property \
+ 	-Wno-graph_child_address \
+ 	-Wno-simple_bus_reg
+ else
+@@ -362,6 +363,11 @@ DTC_FLAGS += -Wnode_name_chars_strict \
+ 	-Wunique_unit_address
+ endif
+ 
++ifeq ($(CONFIG_OF_OVERLAY),y)
++# enable creation of __symbols__ node
++DTC_FLAGS += -@
++endif
++
+ DTC_FLAGS += $(DTC_FLAGS_$(basetarget))
+ 
+ # Set -@ if the target is a base DTB that overlay is applied onto
+@@ -425,6 +431,18 @@ $(obj)/%.dtb: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE
+ $(obj)/%.dtbo: $(src)/%.dtso $(DTC) FORCE
+ 	$(call if_changed_dep,dtc)
+ 
++quiet_cmd_dtco = DTCO    $@
++cmd_dtco = mkdir -p $(dir ${dtc-tmp}) ; \
++	$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
++	$(DTC) -@ -H epapr -O dtb -o $@ -b 0 \
++		-i $(dir $<) $(DTC_FLAGS) \
++		-Wno-interrupts_property \
++		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
++	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
++
++$(obj)/%.dtbo: $(obj)/%.dts FORCE
++	$(call if_changed_dep,dtco)
++
+ dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
+ 
+ # Bzip2
+-- 
+2.39.5
+