MIPS: Add a missing ".set pop" in an early commit

Commit 842dfc11 ("MIPS: Fix build with binutils 2.24.51+") missing
a ".set pop" in macro fpu_restore_16even, so add it.
Signed-off-by: NHuacai Chen <chenhc@lemote.com>
Acked-by: NManuel Lauss <manuel.lauss@gmail.com>
Cc: Steven J . Hill <Steven.Hill@caviumnetworks.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org # 3.18+
Patchwork: https://patchwork.linux-mips.org/patch/14210/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/asmmacro.h

@@ -157,6 +157,7 @@
 	ldc1	$f28, THREAD_FPR28(\thread)
 	ldc1	$f30, THREAD_FPR30(\thread)
 	ctc1	\tmp, fcr31
+	.set	pop
 	.endm
 
 	.macro	fpu_restore_16odd thread