[source] build: skip headers install and config on make target/linux/prepare

[LEDE Commits]

jow pushed a commit to source.git, branch lede-17.01:
https://git.lede-project.org/903a40466311a0d93bd0a6ba8f4e5261cac8141c

commit 903a40466311a0d93bd0a6ba8f4e5261cac8141c
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Wed Feb 15 12:34:52 2017 +0100

    build: skip headers install and config on make target/linux/prepare
    
    This simplifies working with quilt on the kernel tree
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
    (cherry picked from commit dce6eeccc09339c7101a5b6b3fdba8b4d8f41247)
---
 include/kernel-build.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/kernel-build.mk b/include/kernel-build.mk
index 32da94b..56c0fe3 100644
--- a/include/kernel-build.mk
+++ b/include/kernel-build.mk
@@ -152,7 +152,7 @@ define BuildKernel
   endef
 
   download: $(if $(LINUX_SITE),$(DL_DIR)/$(LINUX_SOURCE))
-  prepare: $(STAMP_CONFIGURED)
+  prepare: $(STAMP_PREPARED)
   compile: $(LINUX_DIR)/.modules
 	$(MAKE) -C image compile TARGET_BUILD=