staging: brcm80211: Remove unneeded compile flags.

This removes compile flags that are completely unnecessary when building the
brcmfmac driver.

Also sorts the options to make it a bit easier to look at them.

Signed-off-by: Henry Ptasinski <henryp@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>