RCU_PWR_GATING_CNTL_4
rcu_pwr_gating_cntl = RREG32_RCU(RCU_PWR_GATING_CNTL_4);
WREG32_RCU(RCU_PWR_GATING_CNTL_4, rcu_pwr_gating_cntl);