next: mips: bpf: Fix build failure

Fix:

arch/mips/net/bpf_jit.c: In function 'build_body':
arch/mips/net/bpf_jit.c:762:6: error: unused variable 'tmp'
cc1: all warnings being treated as errors
make[2]: *** [arch/mips/net/bpf_jit.o] Error 1

Seen when building mips:allmodconfig in -next since next-20140924.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>