---

&itcm {
	reg = <0x00000000 DT_SIZE_K(64)>;
};

&dtcm {
	reg = <0x20000000 DT_SIZE_K(128)>;
};

&ocram {
	reg = <0x20200000 DT_SIZE_K(64)>;
};

в системе нет объявленных секции для ocram. 
MEMORY
    {
#if defined(CONFIG_ROMSTART_RELOCATION_ROM)
    ROMSTART_REGION (rx) : ORIGIN = ROMSTART_ADDR, LENGTH = ROMSTART_SIZE
#endif
    FLASH (rx) : ORIGIN = ROM_ADDR, LENGTH = ROM_SIZE
    RAM   (wx) : ORIGIN = RAM_ADDR, LENGTH = RAM_SIZE
#if defined(CONFIG_SDRAM_LMA_ADJUST)
    NXP_FLASH_LMA (rx) : ORIGIN = 0x60000000, LENGTH = 4M
#endif
#if defined(CONFIG_LINKER_DEVNULL_MEMORY)
    DEVNULL_ROM (rx) : ORIGIN = DEVNULL_ADDR, LENGTH = DEVNULL_SIZE
#endif
    LINKER_DT_REGIONS()
    /* Used by and documented in include/linker/intlist.ld */
    IDT_LIST (wx) : ORIGIN = 0xFFFF7FFF, LENGTH = 32K
    }

Используется LINKER_DT_REGIONS