staging: brcm80211: remove dead SDTEST code from fullmac

Remove legacy dead code of SDTEST

Reviewed-by: Arend van Spriel <arend@broadcom.com>
Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --cc drivers/staging/brcm80211/brcmfmac/dhd.h
Simple merge

diff --cc drivers/staging/brcm80211/brcmfmac/dhd_sdio.c
Simple merge