bpfilter: remove extra header search paths for bpfilter_umh

Currently, the header search paths -Itools/include and
-Itools/include/uapi are not used. Let's drop the unused code.

We can remove -I. too by fixing up one C file.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bpfilter/Makefile

@@ -5,7 +5,6 @@
 
 hostprogs-y := bpfilter_umh
 bpfilter_umh-objs := main.o
-KBUILD_HOSTCFLAGS += -I. -Itools/include/ -Itools/include/uapi
 HOSTCC := $(CC)
 
 ifeq ($(CONFIG_BPFILTER_UMH), y)

net/bpfilter/main.c

@@ -6,7 +6,7 @@
 #include <sys/socket.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include "include/uapi/linux/bpf.h"
+#include "../../include/uapi/linux/bpf.h"
 #include <asm/unistd.h>
 #include "msgfmt.h"