Staging: gasket: gasket_sysfs.c: Fix string split issue.

Concatenate a multi-line string constant into a single
line.Issue found by checkpatch.pl.

WARNING:quoted string split across line.

Signed-off-by: Sanjana Sanikommu <sanjana99reddy99@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>