media: ti-vpe: cal: Replace number of ports numerical value by macro

Use the CAL_NUM_CSI2_PORTS macro instead of the hardcoded numerical
value 2 to iterate over the CSI-2 ports.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/ti-vpe/cal.c

@@ -1281,7 +1281,7 @@ static irqreturn_t cal_irq(int irq_cal, void *data)
 		if (status & CAL_HL_IRQ_OCPO_ERR_MASK)
 			dev_err_ratelimited(&cal->pdev->dev, "OCPO ERROR\n");
 
-		for (i = 0; i < 2; ++i) {
+		for (i = 0; i < CAL_NUM_CSI2_PORTS; ++i) {
 			if (status & CAL_HL_IRQ_CIO_MASK(i)) {
 				u32 cio_stat = reg_read(cal,
 							CAL_CSI2_COMPLEXIO_IRQSTATUS(i));