at91: build .dtb file for the CalAmp LMU500 board

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 36542

target/linux/at91/patches/100-ARM-at91-build-dtb-for-LMU5000.patch

+--- a/arch/arm/boot/dts/Makefile
++++ b/arch/arm/boot/dts/Makefile
+@@ -22,6 +22,7 @@ dtb-$(CONFIG_ARCH_AT91) += tny_a9g20.dtb
+ dtb-$(CONFIG_ARCH_AT91) += usb_a9g20.dtb
+ # sam9g45
+ dtb-$(CONFIG_ARCH_AT91) += at91sam9m10g45ek.dtb
++dtb-$(CONFIG_ARCH_AT91) += lmu5000.dtb
+ dtb-$(CONFIG_ARCH_AT91) += pm9g45.dtb
+ # sam9n12
+ dtb-$(CONFIG_ARCH_AT91) += at91sam9n12ek.dtb