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

Commit 842dfc11ea9a21 ("MIPS: Fix build with binutils 2.24.51+") missing
a ".set pop" in macro fpu_restore_16even, so add it.

Signed-off-by: Huacai Chen <[e-mail]>
Acked-by: Manuel Lauss <[e-mail]>
Cc: Steven J . Hill <[e-mail]>
Cc: Fuxin Zhang <[e-mail]>
Cc: Zhangjin Wu <[e-mail]>
Cc: [e-mail]
Cc: [e-mail] # 3.18+
Patchwork: https://patchwork.linux-mips.org/patch/14210/
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/include/asm/asmmacro.h

···
 	ldc1	$f28, THREAD_FPR28(\thread)
 	ldc1	$f30, THREAD_FPR30(\thread)
 	ctc1	\tmp, fcr31
+	.set	pop
 	.endm
 
 	.macro	fpu_restore_16odd thread