[nrf noup] boot/zephyr: fix fw_info search

By the upstream patch the vt get now the pointer to the copy
of the arm_vector instead of original.

This patch fixes address of the firmware which is to be taken by
the fw_info_find.

Signed-off-by: Andrzej Puzdrowski <[email protected]>
(cherry picked from commit 3be724f)

Author: nvlsianpu

boot/zephyr/main.c

@@ -206,7 +206,14 @@ static void do_boot(struct boot_rsp *rsp)
 #endif
 
 #if defined(CONFIG_FW_INFO) && !defined(CONFIG_EXT_API_PROVIDE_EXT_API_UNUSED)
-    const struct fw_info *firmware_info = fw_info_find((uint32_t) vt);
+    uintptr_t fw_start_addr;
+
+    rc = flash_device_base(rsp->br_flash_dev_id, &fw_start_addr);
+    assert(rc == 0);
+
+    fw_start_addr += rsp->br_image_off + rsp->br_hdr->ih_hdr_size;
+
+    const struct fw_info *firmware_info = fw_info_find(fw_start_addr);
     bool provided = fw_info_ext_api_provide(firmware_info, true);
 
 #ifdef PM_S0_ADDRESS