Configure system timer clock
| SYSTIMER_CLK_FO | systimer clock force on |
| ETM_EN | enable systimer’s etm task and event |
| TARGET2_WORK_EN | target2 work enable |
| TARGET1_WORK_EN | target1 work enable |
| TARGET0_WORK_EN | target0 work enable |
| TIMER_UNIT1_CORE1_STALL_EN | If timer unit1 is stalled when core1 stalled |
| TIMER_UNIT1_CORE0_STALL_EN | If timer unit1 is stalled when core0 stalled |
| TIMER_UNIT0_CORE1_STALL_EN | If timer unit0 is stalled when core1 stalled |
| TIMER_UNIT0_CORE0_STALL_EN | If timer unit0 is stalled when core0 stalled |
| TIMER_UNIT1_WORK_EN | timer unit1 work enable |
| TIMER_UNIT0_WORK_EN | timer unit0 work enable |
| CLK_EN | register file clk gating |