staging: dgap: Fix white space errors as reported by checkpatch

This patch fixes white space errors in dgap.c
as reported by checkpatch. It also changes
unnecessary mutliple empty lines with a single
empty line
Signed-off-by: Mark Hounschell <markh@compro.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>