staging: vt6655: Fix typo

Fix typo reported by checkpatch.

Signed-off-by: Marcos Antonio de Jesus Filho <mdejesusfilho@gmail.com>
Link: https://lore.kernel.org/r/20201026201714.GA24239@Zangetsu


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