REG_LDO_SW_CTRL
rtl8xxxu_write8(priv, REG_LDO_SW_CTRL, 0xc3);
rtl8xxxu_write8(priv, REG_LDO_SW_CTRL, 0x83);
rtl8xxxu_write32_set(priv, REG_LDO_SW_CTRL, BIT(31));