iwlwifi: make IWLWIFI a tristate

IWLWIFI should be a tristate so that if IWLCORE and/or IWL3945 are m
and none of them is y kbuild doesn't create an empty
drivers/net/wireless/built-in.o

This patch also removes the pointless "default n".

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

authored by Adrian Bunk and committed by David S. Miller 1da5ea1a 5f6b1ea4

+1 -2
+1 -2
drivers/net/wireless/iwlwifi/Kconfig
··· 1 1 config IWLWIFI 2 - bool 3 - default n 2 + tristate 4 3 5 4 config IWLCORE 6 5 tristate "Intel Wireless Wifi Core"