dmaengine: fsl-dpaa2-qdma: Drop comma after SoC match table sentinel

It does not make sense to have a comma after a sentinel, as any new
elements must be added before the sentinel.

Add a comment to clarify the purpose of the empty element.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Link: https://lore.kernel.org/r/0b8ad[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.h

···
 
 static struct soc_device_attribute soc_fixup_tuning[] = {
 	{ .family = "QorIQ LX2160A"},
-	{ },
+	{ /* sentinel */ }
 };
 
 /* FD pool size: one FD + 3 Frame list + 2 source/destination descriptor */