irqchip/gic-v3-its: Fix access width for gicr_syncr

GICR_SYNCR is a 32bit register, so it is better to access it with
32bit access width, though we have not seen any real problem.
Signed-off-by: NHeyi Guo <guoheyi@huawei.com>
Signed-off-by: NMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200225090023.28020-1-guoheyi@huawei.com

drivers/irqchip/irq-gic-v3-its.c

@@ -1321,7 +1321,7 @@ static void lpi_write_config(struct irq_data *d, u8 clr, u8 set)
 
 static void wait_for_syncr(void __iomem *rdbase)
 {
-	while (gic_read_lpir(rdbase + GICR_SYNCR) & 1)
+	while (readl_relaxed(rdbase + GICR_SYNCR) & 1)
 		cpu_relax();
 }