wlcore: remove WLCORE_QUIRK_NO_ELP

all the current firmwares support elp, so
we can safely remove WLCORE_QUIRK_NO_ELP.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>