The wimax key will be used as a generic wwan key starting with Linux 
3.13. The brcm47xx target uses this key for the 3g buttons. Also remove 
the ifdef around KEY_WPS_BUTTON, this is in the kernel for a long time 
now. 

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39290 3c298f89-4303-0410-b956-a3cf2f4a3e73