soc: xilinx: zynqmp: fix out of bounds array access

The call to xilinx_pm_request requires an array of a larger size.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/5f1409de285d7454af171a54e5f115da9d82c44e.1650440343.git.michal.simek@xilinx.com
diff --git a/drivers/soc/soc_xilinx_zynqmp.c b/drivers/soc/soc_xilinx_zynqmp.c
index 7d33ce2..a71115b 100644
--- a/drivers/soc/soc_xilinx_zynqmp.c
+++ b/drivers/soc/soc_xilinx_zynqmp.c
@@ -49,7 +49,7 @@
 static int soc_xilinx_zynqmp_probe(struct udevice *dev)
 {
 	struct soc_xilinx_zynqmp_priv *priv = dev_get_priv(dev);
-	u32 ret_payload[4];
+	u32 ret_payload[PAYLOAD_ARG_CNT];
 	int ret;
 
 	priv->family = zynqmp_family;