Staging: tidspbridge: Remove unnecessary white space before a quoted newline in dmm.c

This patch fixes the following checkpatch.pl warning in pmgr/dmm.c-
WARNING: unnecessary whitespace before a quoted newline

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>