staging: brcm80211: Separate fullmac vs softmac defs in shared file

wlioctl.h is shared by fullmac and softmac but mostly fullmac. Separate out
fullmac to purge extranous code in softmac and possibly as a step towards it own file.

Signed-off-by: Brett Rudley <brudley@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>