rtl8723bu_efuse_tx_power
struct rtl8723bu_efuse_tx_power tx_power_index_A; /* 0x10 */
struct rtl8723bu_efuse_tx_power tx_power_index_B; /* 0x3a */
struct rtl8723bu_efuse_tx_power tx_power_index_C; /* 0x64 */
struct rtl8723bu_efuse_tx_power tx_power_index_D; /* 0x8e */