iwlwifi-5000: adding initial recognition for the 5000 family

This patch adds initial support for recognizing the iwl 5000 family of NICs
ID

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>