staging: vt6655: rf.c: Remove all unused macros

These macros were reported by forgotte-macros tool
(https://github.com/marcosps/forgotten_macros

).

Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>