ARM: dts: remove redundant imx dtb targets from Makefile

We already have CONFIG_ARCH_MXC cover imx5 and imx6 dtb targets.
Remove the redundant ones with CONFIG_ARCH_IMX5 and CONFIG_SOC_IMX6Q.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/boot/dts/Makefile

@@ -25,14 +25,6 @@ dtb-$(CONFIG_ARCH_EXYNOS) += exynos4210-origen.dtb \
 	exynos4210-trats.dtb \
 	exynos5250-smdk5250.dtb
 dtb-$(CONFIG_ARCH_HIGHBANK) += highbank.dtb
-dtb-$(CONFIG_ARCH_IMX5) += imx51-babbage.dtb \
-	imx53-ard.dtb \
-	imx53-evk.dtb \
-	imx53-qsb.dtb \
-	imx53-smd.dtb
-dtb-$(CONFIG_SOC_IMX6Q) += imx6q-arm2.dtb \
-	imx6q-sabrelite.dtb \
-	imx6q-sabresd.dtb
 dtb-$(CONFIG_ARCH_LPC32XX) += ea3250.dtb phy3250.dtb
 dtb-$(CONFIG_ARCH_KIRKWOOD) += kirkwood-dns320.dtb \
 	kirkwood-dns325.dtb \