dmaengine: axi-dmac: fix possible race in remove()

We need to first free the IRQ before calling of_dma_controller_free().
Otherwise we could get an interrupt and schedule a tasklet while
removing the DMA controller.

Fixes: 0e3b67b3

 ("dmaengine: Add support for the Analog Devices AXI-DMAC DMA controller")
Cc: stable@kernel.org
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240328-axi-dmac-devm-probe-v3-1-523c0176df70@analog.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>