[nrf noup] loader: work-around for multi-image builds

Seems multi-image dependencies are not supported for multi-image in
NCS yet. This is a workaround which reverts some lines to restore
previous MCUboot behavior, so that Immutable bootloader + MCUBoot type
builds will work.

Ref. NCSDK-8681

Signed-off-by: Sigvart Hovland <[email protected]>
(cherry picked from commit 4ce3844)

Author: sigvartmh

boot/bootutil/src/loader.c

@@ -414,7 +414,7 @@ boot_verify_dependencies(struct boot_loader_state *state)
         if (rc == 0) {
             /* All dependencies've been satisfied, continue with next image. */
             BOOT_CURR_IMG(state)++;
-        } else {
+        } else if (rc == BOOT_EBADIMAGE) {
             /* Cannot upgrade due to non-met dependencies, so disable all
              * image upgrades.
              */
@@ -423,7 +423,10 @@ boot_verify_dependencies(struct boot_loader_state *state)
                 BOOT_SWAP_TYPE(state) = BOOT_SWAP_TYPE_NONE;
             }
             break;
-        }
+        } else {
+		/* Other error happened, images are inconsistent */
+		return rc;
+	}
     }
     return rc;
 }
@@ -1821,7 +1824,6 @@ boot_swap_image(struct boot_loader_state *state, struct boot_status *bs)
 }
 #endif
 
-
 /**
  * Performs a clean (not aborted) image update.
  *