Prepare to override also global Makefile

Author: MaxPayne86

meta-arduino-bsp/recipes-bsp/u-boot/u-boot-imx/portenta-x8/board/Makefile

@@ -4,17 +4,18 @@
 # SPDX-License-Identifier:      GPL-2.0+
 #
 
-#obj-y += ../../freescale/common/
-obj-y += mmc.o
-
-obj-y += portenta-x8.o
-obj-$(CONFIG_USB_TCPC) += tcpc.o
-
-ifndef CONFIG_SPL_BUILD
-obj-y += anx7625.o
-endif
+obj-y += imx8mm_evk.o
 
 ifdef CONFIG_SPL_BUILD
 obj-y += spl.o
+ifdef CONFIG_IMX8M_4G_LPDDR4
+obj-y += lpddr4_timing_4g.o
+else
 obj-$(CONFIG_IMX8M_LPDDR4) += lpddr4_timing.o
+obj-$(CONFIG_IMX8M_DDR4) += ddr4_timing.o
+endif
+endif
+
+ifndef CONFIG_SPL_BUILD
+obj-y += anx7625.o
 endif