staging: mt7621-dma: align to match open parenthesis

Align to match open parenthesis.

"CHECK: Alignment should match open parenthesis".
Issue detected by checkpatch tool.

Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
Link: https://lore.kernel.org/r/20191105220320.50180-1-jbi.octave@gmail.com


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