ARM: mach-shmobile: Add compilation support for dtbs using 'make dtbs'

Add compilation support for dtbs using 'make dtbs'

Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Cc: Simon Horman <horms@verge.net.au>
Signed-off-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
Signed-off-by: Simon Horman <horms@verge.net.au>

arch/arm/mach-shmobile/Makefile.boot

@@ -7,3 +7,7 @@ __ZRELADDR	:= $(shell /bin/bash -c 'printf "0x%08x" \
 #
 #params_phys-y (Instead: Pass atags pointer in r2)
 #initrd_phys-y (Instead: Use compiled-in initramfs)
+
+dtb-$(CONFIG_MACH_KZM9G) += sh73a0-kzm9g.dtb
+dtb-$(CONFIG_MACH_KZM9D) += emev2-kzm9d.dtb
+dtb-$(CONFIG_MACH_ARMADILLO800EVA) += r8a7740-armadillo800eva.dtb