Staging: serqt_usb2: fix space coding style issue in serqt_usb2.c

This is a patch to the serqt_usb2.c files that fixed space error and
warning found by the checkpatch.pl tools.

Signed-off-by: Ruslan Pisarev <ruslan@rpisarev.org.ua>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>