staging: mt7621-dma: fix alignment warnings

Fix the checkpatch warning of alignment should match open parenthesis
for some dev_dbg() calls

Signed-off-by: Siddhant Gupta <siddhantgupta416@gmail.com>
Link: https://lore.kernel.org/r/20201106082226.GA22990@Sleakybeast


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>