Revert "s390/smp: enforce lowcore protection on CPU restart"

This reverts commit 6f5c672d.

This breaks normal crash dump when CPU0 is offline.
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

arch/s390/kernel/setup.c

@@ -507,8 +507,8 @@ static void __init setup_lowcore_dat_on(void)
 	S390_lowcore.svc_new_psw.mask |= PSW_MASK_DAT;
 	S390_lowcore.program_new_psw.mask |= PSW_MASK_DAT;
 	S390_lowcore.io_new_psw.mask |= PSW_MASK_DAT;
-	__ctl_set_bit(0, 28);
 	__ctl_store(S390_lowcore.cregs_save_area, 0, 15);
+	__ctl_set_bit(0, 28);
 	put_abs_lowcore(restart_flags, RESTART_FLAG_CTLREGS);
 	put_abs_lowcore(program_new_psw, lc->program_new_psw);
 	for (cr = 0; cr < ARRAY_SIZE(lc->cregs_save_area); cr++)