staging: vt6655: fix space prohibited before that ','

This patch fixes the following checkpatch.pl error:
fix space prohibited before that ','

Signed-off-by: Heba Aamer <heba93aamer@gmail.com>
Reviewed-by: Aya Mahfouz <mahfouz.saif.elyazal@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>