ARM: shmobile: armadillo800eva: Build DTS for multiplatform

Build the r8a7740 Armadillo800EVA board DTB in case
of Multiplatform. The DT reference case will be removed
and can be ignored for now.
Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/Makefile

@@ -372,6 +372,7 @@ dtb-$(CONFIG_ARCH_SHMOBILE_LEGACY) += r7s72100-genmai.dtb \
 	sh7372-mackerel.dtb
 dtb-$(CONFIG_ARCH_SHMOBILE_MULTI) += emev2-kzm9d.dtb \
 	r7s72100-genmai.dtb \
+	r8a7740-armadillo800eva.dtb \
 	r8a7791-henninger.dtb \
 	r8a7791-koelsch.dtb \
 	r8a7790-lager.dtb \