wl12xx: increase minimum singlerole firmware version required

The minimum firmware version required for singlerole after recent
driver changes is 6/7.3.10.0.133.

Reported-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>