dmaengine: dw: dmamux: Export the module device table

This is a tristate driver that can be built as a module, as a result,
the OF match table should be exported with MODULE_DEVICE_TABLE().

Fixes: 134d9c52 ("dmaengine: dw: dmamux: Introduce RZN1 DMA router support")
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220609141455.300879-1-miquel.raynal@bootlin.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>