staging/mt7621-dma: Format lines in "hsdma-mt7621.c" ending with an open parenthesis

This patch fixes the format of the code. It properly formats lines that
should not end with a '(' as suggested by checkpath.pl.

Signed-off-by: Krish Jain <krishjain02939@gmail.com>
Link: https://lore.kernel.org/r/20210908205903.GA108157@panther


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