Staging: tidspbridge: Fix quoted string split across line in dmm.c

This patch fixes the following checkpatch.pl warning in pmgr/dmm.c-
WARNING: quoted string split across lines

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