ARM: dts: lpc32xx: phy3250: add SoC name prefix to board dts file

To simplify matching of DTS files of all NXP LPC32xx powered boards by
a file name add 'lpc3250' prefix to PHYTEC PHYCORE-LPC3250 board dts
file.
Acked-by: Sylvain Lemieux <slemieux.tyco@gmail.com>
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>

arch/arm/boot/dts/Makefile

@@ -242,7 +242,7 @@ dtb-$(CONFIG_ARCH_LPC18XX) += \
 	lpc4357-ea4357-devkit.dtb
 dtb-$(CONFIG_ARCH_LPC32XX) += \
 	lpc3250-ea3250.dtb \
-	phy3250.dtb
+	lpc3250-phy3250.dtb
 dtb-$(CONFIG_MACH_MESON6) += \
 	meson6-atv1200.dtb
 dtb-$(CONFIG_MACH_MESON8) += \