vbe: Allow VBE to load FITs on any architecture

At present the VBE implementation is limited to sandbox only. Adjust the
call to fit_image_load() to remove this limitation.

Signed-off-by: Simon Glass <sjg@chromium.org>

boot/vbe_common.c

@@ -178,7 +178,7 @@ int vbe_read_fit(struct udevice *blk, ulong area_offset, ulong area_size,
 	fit_uname_config = NULL;
 	log_debug("loading FIT\n");
 	ret = fit_image_load(&images, addr, &fit_uname, &fit_uname_config,
-			     IH_ARCH_SANDBOX, image_ph(phase, IH_TYPE_FIRMWARE),
+			     IH_ARCH_DEFAULT, image_ph(phase, IH_TYPE_FIRMWARE),
 			     BOOTSTAGE_ID_FIT_SPL_START, FIT_LOAD_IGNORED,
 			     &load_addr, &len);
 	if (ret < 0)