warp7: io_storage: Remove DTB from FIP

Recently upstreamed changes to OP-TEE mean that it is possible for OP-TEE
to provide a DTB overlay directly to subsequent boot stages thus negating
the requirement to bundle a DTB in the FIP.

This patch switches off the dependency on the DTB in the FIP descriptor
instead we will provide the necessary data as an overlay from OP-TEE.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

plat/imx/imx7/warp7/warp7_bl2_mem_params_desc.c

@@ -27,16 +27,6 @@ static bl_mem_params_node_t bl2_mem_params_descs[] = {
 
 		.next_handoff_image_id = BL33_IMAGE_ID,
 	},
-	{
-		.image_id = HW_CONFIG_ID,
-		SET_STATIC_PARAM_HEAD(ep_info, PARAM_IMAGE_BINARY,
-				      VERSION_2, entry_point_info_t, SECURE | NON_EXECUTABLE),
-		SET_STATIC_PARAM_HEAD(image_info, PARAM_IMAGE_BINARY,
-				      VERSION_2, image_info_t, 0),
-		.image_info.image_base = WARP7_DTB_BASE,
-		.image_info.image_max_size = WARP7_DTB_SIZE,
-		.next_handoff_image_id = INVALID_IMAGE_ID,
-	},
 	{
 		.image_id = BL32_EXTRA1_IMAGE_ID,
 

plat/imx/imx7/warp7/warp7_io_storage.c

@@ -60,10 +60,6 @@ static const io_uuid_spec_t bl32_uuid_spec = {
 	.uuid = UUID_SECURE_PAYLOAD_BL32,
 };
 
-static const io_uuid_spec_t hw_config_uuid_spec = {
-	.uuid = UUID_HW_CONFIG,
-};
-
 static const io_uuid_spec_t bl32_extra1_uuid_spec = {
 	.uuid = UUID_SECURE_PAYLOAD_BL32_EXTRA1,
 };
@@ -112,11 +108,6 @@ static const struct plat_io_policy policies[] = {
 		(uintptr_t)&bl32_extra2_uuid_spec,
 		open_fip
 	},
-	[HW_CONFIG_ID] = {
-		&fip_dev_handle,
-		(uintptr_t)&hw_config_uuid_spec,
-		open_fip
-	},
 	[BL33_IMAGE_ID] = {
 		&fip_dev_handle,
 		(uintptr_t)&bl33_uuid_spec,