Add update client configuration option for disabling storage hash validation

PAL using like PSA FWU API doesn't support storage read of firmware candidate (no psa_fwu_read()).
Add configuration option to disable this flow.

Author: ccli8

update-client-hub/mbed_lib.json

@@ -66,6 +66,12 @@
         "delta-storage-size": {
             "help": "Total storage allocated for delta image. This config item is only for multicast update.",
             "value": null
+        },
+        "disable-storage-hash-validation": {
+            "help": "Disables storage hash validation for PAL using like PSA Firmware Update API not supporting storage read.",
+            "options": [ "null", "1"],
+            "default": null,
+            "value": null
         }
     }
 }

update-client-hub/modules/firmware-manager/source/arm_uc_firmware_manager.c

@@ -300,7 +300,15 @@ static void arm_uc_internal_event_handler(uintptr_t event)
 {
     switch (event) {
         case ARM_UC_PAAL_EVENT_FINALIZE_DONE:
+#if defined(MBED_CONF_UPDATE_CLIENT_DISABLE_STORAGE_HASH_VALIDATION) &&\
+    (MBED_CONF_UPDATE_CLIENT_DISABLE_STORAGE_HASH_VALIDATION == 1)
+            /* PAL using like PSA FWU API doesn't support storage read of firmware candidate (no psa_fwu_read()).
+             * Disable storage hash validation. */
+            event = UCFM_EVENT_FINALIZE_DONE;
+            arm_uc_signal_ucfm_handler(event);
+#else
             event_handler_finalize();
+#endif
             break;
         case ARM_UC_PAAL_EVENT_READ_DONE:
             if (ARM_UC_HUB_getState() == ARM_UC_HUB_STATE_WAIT_FOR_MULTICAST ||