ARM: dts: rmobile: Remove multiple unused DT properties on R-Car Gen3

Filter out dmas dma-names interrupt-parent interrupts interrupts-extended
interrupt-names interrupt-map interrupt-map-mask iommus DT properties on
R-Car Gen3, since they are not used by U-Boot and only take space.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
diff --git a/configs/rcar3_ulcb_defconfig b/configs/rcar3_ulcb_defconfig
index a6f806c..e348758 100644
--- a/configs/rcar3_ulcb_defconfig
+++ b/configs/rcar3_ulcb_defconfig
@@ -36,6 +36,8 @@
 CONFIG_OF_LIST="r8a77950-ulcb-u-boot r8a77960-ulcb-u-boot r8a77965-ulcb-u-boot"
 CONFIG_MULTI_DTB_FIT_LZO=y
 CONFIG_MULTI_DTB_FIT_USER_DEFINED_AREA=y
+CONFIG_OF_DTB_PROPS_REMOVE=y
+CONFIG_OF_REMOVE_PROPS="dmas dma-names interrupt-parent interrupts interrupts-extended interrupt-names interrupt-map interrupt-map-mask iommus"
 CONFIG_ENV_OVERWRITE=y
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y