[PATCH] soc: xilinx: Add error message for invalid payload received from IPI callback.

From: Naman Trivedi Manojbhai <redacted>

payload[0] of response buffer of zynqmp_pm_get_callback_data()
contains valid payload or error code in case of error.

Added error message to inform user about the error code received in
payload[0].

Signed-off-by: Naman Trivedi Manojbhai <redacted>
Signed-off-by: Michal Simek <michal.simek@amd.com>
---

  drivers/soc/xilinx/zynqmp_power.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/drivers/soc/xilinx/zynqmp_power.c b/drivers/soc/xilinx/zynqmp_power.c
index abcf7e883279..07d735b38b49 100644
--- a/drivers/soc/xilinx/zynqmp_power.c
+++ b/drivers/soc/xilinx/zynqmp_power.c

@@ -86,6 +86,8 @@ static irqreturn_t zynqmp_pm_isr(int irq, void *data)
  			pr_err("%s Unsupported InitSuspendCb reason code %d\n",
  			       __func__, payload[1]);
  		}
+	} else {
+		pr_err("%s() Unsupported Callback %d\n", __func__, payload[0]);
  	}
  
  	return IRQ_HANDLED;