Amend patch handling in ps3

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13683 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ps3/Makefile

@@ -22,7 +22,9 @@ define Target/Description
 endef
 
 ifeq ($(CONFIG_TARGET_ps3_petitboot),y)
-# no generic patches required
+# no patches required
+# provide facility for specific patches
+PATCH_DIR=patches-petitboot
 define Kernel/Prepare
 	bzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
 	$(call PatchDir,$(PATCH_DIR),)