pxa3xx_nand: disable nand irq in initialization

In some bootloader, IRQ is enabled. Writing nand triggers unexpected
interrupts. So disable nand irq in initialization. After nand
initialized and in working state, irq is controlled by nand driver.
Signed-off-by: NHaojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: NEric Miao <eric.y.miao@gmail.com>

drivers/mtd/nand/pxa3xx_nand.c

@@ -1244,6 +1244,9 @@ static int pxa3xx_nand_probe(struct platform_device *pdev)
 	if (ret)
 		goto fail_free_io;
 
+	/* initialize all interrupts to be disabled */
+	disable_int(info, NDSR_MASK);
+
 	ret = request_irq(irq, pxa3xx_nand_irq, IRQF_DISABLED,
 			  pdev->name, info);
 	if (ret < 0) {