ARM: renesas: Add R8A779A0 V3U Falcon board code

Add board code for the R8A779A0 V3U Falcon board.

Signed-off-by: Hai Pham <hai.pham.ud@renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
--
Marek: - various small rebase fixes and clean ups
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 9fb3868..6610ce5 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -904,7 +904,8 @@
 	r8a77970-eagle-u-boot.dtb \
 	r8a77980-condor-u-boot.dtb \
 	r8a77990-ebisu-u-boot.dtb \
-	r8a77995-draak-u-boot.dtb
+	r8a77995-draak-u-boot.dtb \
+	r8a779a0-falcon-u-boot.dtb
 
 ifdef CONFIG_RCAR_GEN3
 DTC_FLAGS += -R 4 -p 0x1000