wl1271: Fix SG configuration message structures

The bluetooth coexistence (SG) configuration messages have changed and
were completely wrong. For instance, intending to enable the SG, it was
instead disabled.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Teemu Paasikivi <ext-teemu.3.paasikivi@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>