wl18xx: default config alignment with phy defaults

Driver default config is aligned with phy default parameters.

Now that RDL1_3 has 2 antennas defined by default we need to explicitly
define ht.mode to HT_MODE_WIDE to have SISO40 as default.

Signed-off-by: Yair Shapira <yair.shapira@ti.com>
Signed-off-by: Igal Chernobelsky <igalc@ti.com>
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>