misc: xilinx_trafgen: deprecate the driver

There are not many users for the driver.
Deprecate the driver.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>

drivers/misc/Kconfig

@@ -491,6 +491,8 @@ config XILINX_TRAFGEN
 	  allow the user to generate a wide variety of traffic based on their
 	  their requirements.
 
+	  This driver is deprecated and will be removed soon.
+
 	  If unsure, say N
 
 config XILINX_AIE

drivers/misc/xilinx_trafgen.c

@@ -1604,6 +1604,8 @@ static int xtg_probe(struct platform_device *pdev)
 	if (var == XTG_INIT_VERSION)
 		tg->xtg_mram_offset = XTG_MASTER_RAM_INIT_OFFSET;
 
+	/* Let the users know they are using deprecated driver */
+	dev_notice(&pdev->dev, "xilinx trafgen driver is deprecated\n");
 	dev_info(&pdev->dev, "Probing xilinx traffic generator success\n");
 
 	return 0;