boot: zephyr: enable ram load for ARM

static void do_boot(struct boot_rsp *rsp)

{

    struct arm_vector_table *vt;

    uintptr_t flash_base;

    int rc;

    /* The beginning of the image is the ARM vector table, containing

     * the initial stack pointer address and the reset vector

     * consecutively. Manually set the stack pointer and jump into the

     * reset vector

     */

#ifdef CONFIG_BOOT_RAM_LOAD

    /* Get ram address for image */

    vt = (struct arm_vector_table *)(rsp->br_hdr->ih_load_addr + rsp->br_hdr->ih_hdr_size);

#else

    uintptr_t flash_base;

    int rc;

    /* Jump to flash image */

    rc = flash_device_base(rsp->br_flash_dev_id, &flash_base);

    assert(rc == 0);

    vt = (struct arm_vector_table *)(flash_base +

                                     rsp->br_image_off +

                                     rsp->br_hdr->ih_hdr_size);

#endif

    sys_clock_disable();