1. move settings of WIFI_CLK_EN_REG for bluetooth into controller init/deinit APIs 2. modify the bit mask used in phy_rf init/deinit to use WIFI-BT shared bits
1. move settings of WIFI_CLK_EN_REG for bluetooth into controller init/deinit APIs 2. modify the bit mask used in phy_rf init/deinit to use WIFI-BT shared bits