Revert "zephyr: Change DT_FLASH_AREA_ macros to FLASH_AREA_"

This reverts commit 6e26e38585cc28ee2b22077740507546fe909dc9.

Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
diff --git a/boot/zephyr/include/target.h b/boot/zephyr/include/target.h
index e71bfb5..57a412b 100644
--- a/boot/zephyr/include/target.h
+++ b/boot/zephyr/include/target.h
@@ -20,7 +20,6 @@
  * everything we need.
  */
 #include <soc.h>
-#include <storage/flash_map.h>
 
 #define FLASH_ALIGN FLASH_WRITE_BLOCK_SIZE
 
@@ -32,9 +31,12 @@
 #if (!defined(CONFIG_XTENSA) && !defined(DT_FLASH_DEV_NAME)) || \
     (defined(CONFIG_XTENSA) && !defined(DT_JEDEC_SPI_NOR_0_LABEL)) || \
     !defined(FLASH_ALIGN) ||                  \
-    !(FLASH_AREA_LABEL_EXISTS(image_0)) || \
-    !(FLASH_AREA_LABEL_EXISTS(image_1)) || \
-    (!defined(CONFIG_BOOT_SWAP_USING_MOVE) && !(FLASH_AREA_LABEL_EXISTS(image_scratch)))
+    !defined(DT_FLASH_AREA_IMAGE_0_OFFSET) || \
+    !defined(DT_FLASH_AREA_IMAGE_0_SIZE) || \
+    !defined(DT_FLASH_AREA_IMAGE_1_OFFSET) || \
+    !defined(DT_FLASH_AREA_IMAGE_1_SIZE) || \
+    (!defined(CONFIG_BOOT_SWAP_USING_MOVE) && !defined(DT_FLASH_AREA_IMAGE_SCRATCH_OFFSET)) || \
+    (!defined(CONFIG_BOOT_SWAP_USING_MOVE) && !defined(DT_FLASH_AREA_IMAGE_SCRATCH_SIZE))
 #error "Target support is incomplete; cannot build mcuboot."
 #endif