boot: zephyr: Fix 96b_nitrogen flash alignment
The Zephyr flash driver transparently handles non-word-aligned writes,
but the NRF52's flash write alignment is 4 bytes. Fix that.
*/
#define FLASH_DRIVER_NAME "NRF5_FLASH"
-#define FLASH_ALIGN 1
+#define FLASH_ALIGN 4
#define FLASH_AREA_IMAGE_0_OFFSET 0x08000
#define FLASH_AREA_IMAGE_0_SIZE 0x3A000
#define FLASH_AREA_IMAGE_1_OFFSET 0x42000
