s390: Use arch_local_irq_{save,restore}() in early boot code

Commit 997acaf6 ("lockdep: report broken irq restoration") makes
compiling s390 fail because the irq enable/disable functions are now
no longer fully contained in header files.

Fixes: 997acaf6 ("lockdep: report broken irq restoration")
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>

drivers/s390/char/sclp_early_core.c

@@ -66,13 +66,13 @@ int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb)
 	unsigned long flags;
 	int rc;
 
-	raw_local_irq_save(flags);
+	flags = arch_local_irq_save();
 	rc = sclp_service_call(cmd, sccb);
 	if (rc)
 		goto out;
 	sclp_early_wait_irq();
 out:
-	raw_local_irq_restore(flags);
+	arch_local_irq_restore(flags);
 	return rc;
 }