MIPS: Branch straight to ll in mips_atomic_set()

Adjust the atomic loop in the MIPS_ATOMIC_SET operation of the sysmips
system call to branch straight back to the linked load rather than
jumping via a different subsection (whose purpose remains a mystery to
me).

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16150/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/syscall.c

@@ -137,13 +137,9 @@ static inline int mips_atomic_set(unsigned long addr, unsigned long new)
 		"	move	%[tmp], %[new]				\n"
 		"2:							\n"
 		user_sc("%[tmp]", "(%[addr])")
-		"	beqz	%[tmp], 4f				\n"
+		"	beqz	%[tmp], 1b				\n"
 		"3:							\n"
 		"	.insn						\n"
-		"	.subsection 2					\n"
-		"4:	b	1b					\n"
-		"	.previous					\n"
-		"							\n"
 		"	.section .fixup,\"ax\"				\n"
 		"5:	li	%[err], %[efault]			\n"
 		"	j	3b					\n"