for rk322x power down post-PLL must to both set rege0[5]=0 and set pre pll pre-PLL unlock. So power down pre-PLL before post-PLL power down Change-Id: If0eb325b10bb6eb117b0a61d5852e9aae9d92ba6 Signed-off-by: Huicong Xu <xhc@rock-chips.com>