plat/st: invalidate data only when binary is not skipped

Fix a Data abort while trying to invalidate data at address 0.
When the partition is skipped, the invalidate must not be done
as the bl_info are not filled.

Change-Id: Ib90f1a7ac55648a9228e6dc53b875265a4eede32
Signed-off-by: Lionel Debieve <lionel.debieve@foss.st.com>
Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/tf-a/+/214784


Tested-by: Nicolas LE BAYON <nicolas.le.bayon@st.com>
Reviewed-by: CIBUILD <MDG-smet-aci-builds@list.st.com>
Reviewed-by: Nicolas LE BAYON <nicolas.le.bayon@st.com>
Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/tf-a/+/224185


Tested-by: Sebastien PASDELOUP <sebastien.pasdeloup-ext@st.com>
Reviewed-by: Sebastien PASDELOUP <sebastien.pasdeloup-ext@st.com>
Reviewed-by: Yann GAUTIER <yann.gautier@foss.st.com>

plat/st/stm32mp1/bl2_plat_setup.c

@@ -725,7 +725,8 @@ int bl2_plat_handle_post_image_load(unsigned int image_id)
 	 * Invalidate remaining data read from MMC but not flushed by load_image_flush().
 	 * We take the worst case which is 2 MMC blocks.
 	 */
-	if (image_id != FW_CONFIG_ID) {
+	if ((image_id != FW_CONFIG_ID) &&
+	    ((bl_mem_params->image_info.h.attr & IMAGE_ATTRIB_SKIP_LOADING) == 0U)) {
 		inv_dcache_range(bl_mem_params->image_info.image_base +
 				 bl_mem_params->image_info.image_size,
 				 2U * MMC_BLOCK_SIZE);