Staging: vt6655: Format long lines.

Add whitespace around '-' operator and wrap long lines. Issue found by
checkpatch.pl.

Signed-off-by: Briana Oursler <briana.oursler@gmail.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Link: https://lore.kernel.org/r/e1c9fc822f1576f9896799fea6c467457cf0f6da.1585763457.git.briana.oursler@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>