mmIH_CLK_CTRL
def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL);
WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data);
if (!RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL))
def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL);
WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data);
def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL);
WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data);