RTW_BRSR
RTW_WBW(regs, RTW_MSR, RTW_BRSR);
RTW_WRITE16(regs, RTW_BRSR, RTW_BRSR_MBR8180_2MBPS);
RTW_SYNC(regs, RTW_BRSR, RTW_BRSR);
PRINTREG16(regs, RTW_BRSR);