misc: scu: Increase the timeout for MU communication

When power on some sources in Video system, current timeout 10ms is
too short and returns before SCU response. So increase the timeout
to 1s.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/misc/imx8/scu.c b/drivers/misc/imx8/scu.c
index a7654a7..6916b75 100644
--- a/drivers/misc/imx8/scu.c
+++ b/drivers/misc/imx8/scu.c
@@ -74,7 +74,7 @@
 	assert(reg_index < MU_TR_COUNT);
 
 	/* Wait RX register to be full. */
-	ret = readl_poll_timeout(&base->sr, val, val & mask, 10000);
+	ret = readl_poll_timeout(&base->sr, val, val & mask, 1000000);
 	if (ret < 0) {
 		printf("%s timeout\n", __func__);
 		return -ETIMEDOUT;