Fix refcount leak bug in of_xudma_dev_get()

Summary

A vulnerability exists in the Linux kernel's DMA engine, specifically concerning Texas Instruments' K3 UDMA private implementation. This issue arises from a reference count leak due to insufficient handling of the reference returned by of_parse_phandle(). The affected code does not properly release the resource when it is no longer in use or during failure paths, leading to potential resource mismanagement. Proper mitigation involves moving the call to of_node_put() earlier in the code flow to ensure that resources are released appropriately, thereby preventing leaks that could hinder system stability.

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