dmaengine: ti: dma-crossbar: fix device leak on dra7x route allocation

commit dc7e44d upstream.

Make sure to drop the reference taken when looking up the crossbar
platform device during dra7x route allocation.

Note that commit 615a4bf ("dmaengine: ti: Add missing put_device in
ti_dra7_xbar_route_allocate") fixed the leak in the error paths but the
reference is still leaking on successful allocation.

Fixes: a074ae3 ("dmaengine: Add driver for TI DMA crossbar on DRA7x")
Fixes: 615a4bf ("dmaengine: ti: Add missing put_device in ti_dra7_xbar_route_allocate")
Cc: stable@vger.kernel.org	# 4.2: 615a4bf
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20251117161258.10679-14-johan@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: jhovold

drivers/dma/ti/dma-crossbar.c

@@ -288,6 +288,8 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec,
 
 	ti_dra7_xbar_write(xbar->iomem, map->xbar_out, map->xbar_in);
 
+	put_device(&pdev->dev);
+
 	return map;
 }