staging: vt6656: Clean up RXvFreeRCB.

Clean up white space, comments and camel case.

Camel case changes
pRCB -> rcb
bReAllocSkb -> re_alloc_skb
pDevice -> priv

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>