R_BRK_R
rtw89_phy_write32_idx(rtwdev, R_BRK_R, B_HTMCS_LMT, 0, phy_idx);
rtw89_phy_write32_idx(rtwdev, R_BRK_R, B_VHTMCS_LMT, 0, phy_idx);
rtw89_phy_write32_idx(rtwdev, R_BRK_R, B_HTMCS_LMT, 1, phy_idx);
rtw89_phy_write32_idx(rtwdev, R_BRK_R, B_VHTMCS_LMT, 1, phy_idx);