tty: xilinx_uartps: Add check for runtime_get_sync calls

Add a check for the runtime get_sync calls.

Addresses-Coverity: Event check_return.
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
State: pending

drivers/tty/serial/xilinx_uartps.c

@@ -1089,13 +1089,17 @@ static void cdns_uart_poll_put_char(struct uart_port *port, unsigned char c)
 static void cdns_uart_pm(struct uart_port *port, unsigned int state,
 		   unsigned int oldstate)
 {
+	int ret;
+
 	switch (state) {
 	case UART_PM_STATE_OFF:
 		pm_runtime_mark_last_busy(port->dev);
 		pm_runtime_put_autosuspend(port->dev);
 		break;
 	default:
-		pm_runtime_get_sync(port->dev);
+		ret = pm_runtime_get_sync(port->dev);
+		if (ret < 0)
+			dev_err(port->dev, "Failed to enable clocks\n");
 		break;
 	}
 }