boot/zephyr: Define SOC_FLASH_0_ID and SPI_FLASH_0_ID

The defines have been taken from the Zephyr flash_map.h
but as they are provided there for MCUboot only, they can be just
defined here.

Signed-off-by: Dominik Ermel <[email protected]>

Author: de-nordic

boot/zephyr/include/sysflash/sysflash.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023 Nordic Semiconductor ASA
+ * Copyright (c) 2023-2024 Nordic Semiconductor ASA
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -12,6 +12,14 @@
 #include <zephyr/storage/flash_map.h>
 #include <zephyr/sys/util_macro.h>
 
+#ifndef SOC_FLASH_0_ID
+#define SOC_FLASH_0_ID 0
+#endif
+
+#ifndef SPI_FLASH_0_ID
+#define SPI_FLASH_0_ID 1
+#endif
+
 #if !defined(CONFIG_SINGLE_APPLICATION_SLOT) && !defined(CONFIG_MCUBOOT_BOOTLOADER_MODE_SINGLE_APP)
 
 /* Each pair of slots is separated by , and there is no terminating character */