fdt: Update Makefile rules with the new OF_REAL Kconfig

Simplify some of the Makefile rules using this Kconfig.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/Makefile b/Makefile
index a09f48f..5ad06b8 100644
--- a/Makefile
+++ b/Makefile
@@ -1292,10 +1292,6 @@
 # Use 'make BINMAN_VERBOSE=3' to set vebosity level
 default_dt := $(if $(DEVICE_TREE),$(DEVICE_TREE),$(CONFIG_DEFAULT_DEVICE_TREE))
 
-# Tell binman whether we have a devicetree for SPL and TPL
-have_spl_dt := $(if $(CONFIG_SPL_OF_PLATDATA),,$(CONFIG_SPL_OF_CONTROL))
-have_tpl_dt := $(if $(CONFIG_TPL_OF_PLATDATA),,$(CONFIG_TPL_OF_CONTROL))
-
 quiet_cmd_binman = BINMAN  $@
 cmd_binman = $(srctree)/tools/binman/binman $(if $(BINMAN_DEBUG),-D) \
                 --toolpath $(objtree)/tools \
@@ -1309,7 +1305,8 @@
 		-a scp-path=$(SCP) \
 		-a spl-bss-pad=$(if $(CONFIG_SPL_SEPARATE_BSS),,1) \
 		-a tpl-bss-pad=$(if $(CONFIG_TPL_SEPARATE_BSS),,1) \
-		-a spl-dtb=$(have_spl_dt) -a tpl-dtb=$(have_tpl_dt) \
+		-a spl-dtb=$(CONFIG_SPL_OF_REAL) \
+		-a tpl-dtb=$(CONFIG_SPL_OF_REAL) \
 		$(BINMAN_$(@F))
 
 OBJCOPYFLAGS_u-boot.ldr.hex := -I binary -O ihex
diff --git a/lib/Makefile b/lib/Makefile
index dfe772a..09e380e 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -80,10 +80,7 @@
 obj-$(CONFIG_LIBAVB) += libavb/
 
 obj-$(CONFIG_$(SPL_TPL_)OF_LIBFDT) += libfdt/
-ifneq ($(CONFIG_$(SPL_TPL_)BUILD)$(CONFIG_$(SPL_TPL_)OF_PLATDATA),yy)
-obj-$(CONFIG_$(SPL_TPL_)OF_CONTROL) += fdtdec_common.o
-obj-$(CONFIG_$(SPL_TPL_)OF_CONTROL) += fdtdec.o
-endif
+obj-$(CONFIG_$(SPL_TPL_)OF_REAL) += fdtdec_common.o fdtdec.o
 
 ifdef CONFIG_SPL_BUILD
 obj-$(CONFIG_SPL_YMODEM_SUPPORT) += crc16.o
diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl
index 7f8c5f0..6f26eb1 100644
--- a/scripts/Makefile.spl
+++ b/scripts/Makefile.spl
@@ -295,18 +295,15 @@
 FINAL_DTB_CONTAINER = $(obj)/$(SPL_BIN).multidtb.fit
 endif
 
-# Build the .dtb file if:
-#   - we are not using OF_PLATDATA
-#   - we are using OF_CONTROL
+# Build the .dtb file if needed
+#   - OF_REAL is enabled
 #   - we have either OF_SEPARATE or OF_HOSTFILE
 build_dtb :=
-ifeq ($(CONFIG_$(SPL_TPL_)OF_PLATDATA),)
-ifneq ($(CONFIG_$(SPL_TPL_)OF_CONTROL),)
+ifneq ($(CONFIG_$(SPL_TPL_)OF_REAL),)
 ifeq ($(CONFIG_OF_SEPARATE)$(CONFIG_OF_HOSTFILE),y)
 build_dtb := y
 endif
 endif
-endif
 
 ifneq ($(build_dtb),)
 $(obj)/$(SPL_BIN)-dtb.bin: $(obj)/$(SPL_BIN)-nodtb.bin \