mmRLC_CLK_CNTL
def = data = RREG32_SOC15(GC, 0, mmRLC_CLK_CNTL);
WREG32_SOC15(GC, 0, mmRLC_CLK_CNTL, data);
def = data = RREG32_SOC15(GC, 0, mmRLC_CLK_CNTL);
WREG32_SOC15(GC, 0, mmRLC_CLK_CNTL, data);