selftests/kcmp: Don't include kernel headers

The kcmp test mucks with the include path to bring in the kernel
headers, and x86 headers too for reasons that are not clear.

Now that kcmp.h is exported none of that should be necessary.
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
Acked-by: NCyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: NShuah Khan <shuahkh@osg.samsung.com>

tools/testing/selftests/kcmp/Makefile

@@ -8,11 +8,7 @@ ifeq ($(ARCH),x86_64)
 	ARCH := x86
 	CFLAGS := -DCONFIG_X86_64 -D__x86_64__
 endif
-
-CFLAGS += -I../../../../arch/x86/include/generated/
-CFLAGS += -I../../../../include/
 CFLAGS += -I../../../../usr/include/
-CFLAGS += -I../../../../arch/x86/include/
 
 all:
 ifeq ($(ARCH),x86)