[PATCH] e1000: Added functions declarations

Added e1000_mc_addr_list_update
Added e1000_read_reg_io
Added e1000_enable_pciex_master

These are not static functions, that is why we have them declared in the header.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>