staging: lustre: linux-tcpip: Remove duplicate header file inclusion

Removed the header files included twice.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c

@@ -35,7 +35,6 @@
  */
 #define DEBUG_SUBSYSTEM S_LNET
 
-#include <linux/libcfs/libcfs.h>
 #include <linux/libcfs/libcfs.h>
 
 #include <linux/if.h>