drivers/net/wireless/iwlwifi/iwl-3945.c: fix printk warning

drivers/net/wireless/iwlwifi/iwl-3945.c: In function 'iwl3945_add_radiotap':
drivers/net/wireless/iwlwifi/iwl-3945.c:269: warning: format '%d' expects type 'int', but argument 3 has type 'long unsigned int'

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>