As reported by Lai, the commit 3c88c692 ("x86/stackframe/32:
Provide consistent pt_regs") wrecked the IRET EXTABLE entry by making
.Lirq_return not point at IRET.

Fix this by placing IRET_FRAME in RESTORE_REGS, to mirror how
FIXUP_FRAME is part of SAVE_ALL.

Fixes: 3c88c692 ("x86/stackframe/32: Provide consistent pt_regs")
Reported-by: NLai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: NAndy Lutomirski <luto@kernel.org>
Cc: stable@kernel.org