x86_64: Fix S3 fail path

As acpi_enter_sleep_state can fail, take this into account in
do_suspend_lowlevel and don't return to the do_suspend_lowlevel's
caller. This would break (currently) fpu status and preempt count.

Technically, this means use `call' instead of `jmp' and `jmp' to
the `resume_point' after the `call' (i.e. if
acpi_enter_sleep_state returns=fails). `resume_point' will handle
the restore of fpu and preempt count gracefully.

Signed-off-by: Jiri Slaby <[e-mail]>
Signed-off-by: Rafael J. Wysocki <[e-mail]>
Signed-off-by: Len Brown <[e-mail]>

arch/x86/kernel/acpi/wakeup_64.S

···
 	addq	$8, %rsp
 	movl	$3, %edi
 	xorl	%eax, %eax
-	jmp	acpi_enter_sleep_state
+	call	acpi_enter_sleep_state
+	/* in case something went wrong, restore the machine status and go on */
+	jmp	resume_point
 
 	.align 4
 resume_point: