fix KERNEL_PATCHVER, properly strip -rc* suffixes

SVN-Revision: 15353

include/kernel-version.mk

@@ -45,5 +45,5 @@ split_version=$(subst ., ,$(1))
 merge_version=$(subst $(space),.,$(1))
 KERNEL_BASE=$(firstword $(subst -, ,$(LINUX_VERSION)))
 KERNEL=$(call merge_version,$(wordlist 1,2,$(call split_version,$(KERNEL_BASE))))
-KERNEL_PATCHVER=$(call merge_version,$(wordlist 1,3,$(call split_version,$(LINUX_VERSION))))
+KERNEL_PATCHVER=$(call merge_version,$(wordlist 1,3,$(call split_version,$(KERNEL_BASE))))