Staging: brcm80211: remove some more macros from linuxver.h

These aren't needed anymore, and now we are down to just one broken one,
and a whole bunch of #include files here.  This can be further factored
by moving the proper #includes into the different .c files, and not
leaving them in this one large one.

Cc: Brett Rudley <brudley@broadcom.com>
Cc: Henry Ptasinski <henryp@broadcom.com>
Cc: Nohee Ko <noheek@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>