staging: vt6656: replaced custom BYTE definition with u8

Checkpatch findings were not resolved, only direct replacement.

sed -i 's/\bBYTE\b/u8/g' drivers/staging/vt6656/*.[ch]
sed -i 's/\bPBYTE\b/u8 */g' drivers/staging/vt6656/*.[ch]

Signed-off-by: Andres More <more.andres@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>