zephyr: fix do_boot() warning on ARM
Commit ("zephyr: add support for x86 booting method")
introduced a backend-specific do_boot() function. On ARM, this casts
to an undefined type 'struct vector_table*'.  Fix this by using the
'struct arm_vector_table*' introduced in that patch.
@@ -49,7 +49,7 @@ static void do_boot(struct boot_rsp *rsp)
* consecutively. Manually set the stack pointer and jump into the
* reset vector
*/
- vt = (struct vector_table *)(rsp->br_image_addr +
+ vt = (struct arm_vector_table *)(rsp->br_image_addr +
rsp->br_hdr->ih_hdr_size);
irq_lock();
_MspSet(vt->msp);
