irqchip/irq-bcm7120-l2: Use correct I/O accessors for irq_fwd_mask

Initialization of irq_fwd_mask was done using __raw_writel() which
happens to work for all cases except when using ARM BE8 which requires
writel() (with the proper swapping). Move the initialization of the
irq_fwd_mask till later when we have correctly defined our I/O
accessors.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

drivers/irqchip/irq-bcm7120-l2.c

@@ -250,12 +250,6 @@ static int __init bcm7120_l2_intc_probe(struct device_node *dn,
 	if (ret < 0)
 		goto out_free_l1_data;
 
-	for (idx = 0; idx < data->n_words; idx++) {
-		__raw_writel(data->irq_fwd_mask[idx],
-			     data->pair_base[idx] +
-			     data->en_offset[idx]);
-	}
-
 	for (irq = 0; irq < data->num_parent_irqs; irq++) {
 		ret = bcm7120_l2_intc_init_one(dn, data, irq, valid_mask);
 		if (ret)
@@ -297,6 +291,10 @@ static int __init bcm7120_l2_intc_probe(struct device_node *dn,
 		gc->reg_base = data->pair_base[idx];
 		ct->regs.mask = data->en_offset[idx];
 
+		/* gc->reg_base is defined and so is gc->writel */
+		irq_reg_writel(gc, data->irq_fwd_mask[idx],
+			       data->en_offset[idx]);
+
 		ct->chip.irq_mask = irq_gc_mask_clr_bit;
 		ct->chip.irq_unmask = irq_gc_mask_set_bit;
 		ct->chip.irq_ack = irq_gc_noop;