dmaengine: ti: k3-udma: Remove unused declarations

Commit d7024191 ("dmaengine: ti: k3-udma: Add glue layer for non DMAengine users")
declared but never implemented these.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://lore.kernel.org/r/20240810094540.2589310-1-yuehaibing@huawei.com


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