frdm_k64f: Use entire flash.
Expand the data slots to 384K each, leaving the boot and scratch areas
as 128K.  This allows more room for code, but will wear the scratch
partition about 3x faster because of the more extensive use of the
partition.
#define FLASH_DRIVER_NAME CONFIG_SOC_FLASH_MCUX_DEV_NAME
#define FLASH_ALIGN 8
#define FLASH_AREA_IMAGE_0_OFFSET 0x20000
-#define FLASH_AREA_IMAGE_0_SIZE 0x20000
-#define FLASH_AREA_IMAGE_1_OFFSET 0x40000
-#define FLASH_AREA_IMAGE_1_SIZE 0x20000
-#define FLASH_AREA_IMAGE_SCRATCH_OFFSET 0x60000
+#define FLASH_AREA_IMAGE_0_SIZE 0x60000
+#define FLASH_AREA_IMAGE_1_OFFSET 0x80000
+#define FLASH_AREA_IMAGE_1_SIZE 0x60000
+#define FLASH_AREA_IMAGE_SCRATCH_OFFSET 0xe0000
#define FLASH_AREA_IMAGE_SCRATCH_SIZE 0x20000
#define FLASH_AREA_IMAGE_SECTOR_SIZE 0x01000
