Staging: bcm: Outsourced PHS rule applying

This patch outsources the big PHS-rule-applying code chunk into a
function.

It also replaces member accessing by using variables.

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>