at91bootstrap: don't depend on BR .config

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

boot/at91bootstrap/at91bootstrap.mk

@@ -35,7 +35,7 @@ $(AT91BOOTSTRAP_DIR)/.unpacked: $(DL_DIR)/$(AT91BOOTSTRAP_SOURCE)
 	toolchain/patch-kernel.sh $(AT91BOOTSTRAP_DIR) boot/at91bootstrap/ at91bootstrap-$(AT91BOOTSTRAP_VERSION)\*.patch
 	touch $(AT91BOOTSTRAP_DIR)/.unpacked
 
-$(AT91BOOTSTRAP_DIR)/.configured: $(AT91BOOTSTRAP_DIR)/.unpacked .config
+$(AT91BOOTSTRAP_DIR)/.configured: $(AT91BOOTSTRAP_DIR)/.unpacked
 	$(MAKE) \
 		MEMORY=$(AT91BOOTSTRAP_MEMORY) \
 		CROSS_COMPILE=$(TARGET_CROSS) \