wl12xx: disable dual band

our chip is WL1271L which doesn't support 5GHz

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: Ifdf6ba1a96fd57207227fbaffcee4478a01fb645
wl12xx: fix calibration

load correct ini file & fix path

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I7ea3ef89117c2885776b08ac8dfada74b062c832