-CONFIG_SYS_MMC_BOOT_PART_SIZE = $(shell expr 4096 \* 1024)
-CONFIG_U_BOOT_IMG_SIZE = $(shell expr 1 \* 1048576)
-CONFIG_MAX_DTB_SIZE = $(shell expr 64 \* 1024)
-CONFIG_ENV_SIZE = $(shell expr 128 \* 1024)
-CONFIG_ENV_OFFSET = $(shell expr $(CONFIG_SYS_MMC_BOOT_PART_SIZE) - $(CONFIG_ENV_SIZE))
-CONFIG_SYS_DTB_OFFSET=$(shell expr $(CONFIG_ENV_OFFSET) - $(CONFIG_MAX_DTB_SIZE))
+CONFIG_SYS_MMC_BOOT_PART_SIZE := $(shell expr 4096 \* 1024)
+CONFIG_U_BOOT_IMG_SIZE := $(shell expr 1 \* 1048576)
+CONFIG_MAX_DTB_SIZE := $(shell expr 64 \* 1024)
+CONFIG_ENV_SIZE := $(shell expr 128 \* 1024)
+CONFIG_ENV_OFFSET := $(shell expr $(CONFIG_SYS_MMC_BOOT_PART_SIZE) - $(CONFIG_ENV_SIZE))
+CONFIG_SYS_DTB_OFFSET := $(shell expr $(CONFIG_ENV_OFFSET) - $(CONFIG_MAX_DTB_SIZE))