dmaengine: Use of_property_present() for testing DT property presence

It is preferred to use typed property access functions (i.e.
of_property_read_<type> functions) rather than low-level
of_get_property/of_find_property functions for reading properties. As
part of this, convert of_get_property/of_find_property calls to the
recently added of_property_present() helper when we just want to test
for presence of a property and nothing more.

Signed-off-by: Rob Herring <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/dma/of-dma.c

···
 	}
 
 	/* Silently fail if there is not even the "dmas" property */
-	if (!of_find_property(np, "dmas", NULL))
+	if (!of_property_present(np, "dmas"))
 		return ERR_PTR(-ENODEV);
 
 	count = of_property_count_strings(np, "dma-names");