Staging: silicom: fix up compiler warnings in bp_proc.c

This removes the compiler warnings for unused variables and functions in
the bp_proc.c file.

Cc: Chad Williamson <chad@dahc.us>
Cc: Daniel Cotey <puff65537@bansheeslibrary.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>