[nrf noup] zephyr: sysflash: Add missing NETCORE partition support

Add missing definitions for NETCORE partition used by nRF5340.

Signed-off-by: Dominik Ermel <dominik.ermel@nordicsemi.no>

Author: de-nordic

boot/zephyr/include/sysflash/sysflash.h

@@ -43,6 +43,13 @@
 #define SPI_FLASH_0_ID 1
 #endif
 
+/* Support for NETCPU application image updates */
+#if CONFIG_MCUBOOT_NETWORK_CORE_IMAGE_NUMBER != -1
+#define NETCPU_APP_SLOT_OFFSET  PARTITION_OFFSET(s0_partition)
+#define NETCPU_APP_SLOT_SIZE    PARTITION_SIZE(s0_partition)
+#define NETCPU_APP_SLOT_END     (NETCPU_APP_SLOT_OFFSET + NETCPU_APP_SLOT_SIZE)
+#endif
+
 /* This is workaround because of bootutil public interface also requiring this
  * file. In reality application is supposed to maintain flash area access,
  * but bootutil uses own definitions, taken directly from DTS, which includes