clk: rockchip: px30: Make uart2 clocks critical

Change-Id: I6efeb6cee633c9bc39dec43a64a025a4790a6e3d
Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>

drivers/clk/rockchip/clk-px30.c

@@ -940,6 +940,8 @@ static const char *const px30_pmucru_critical_clocks[] __initconst = {
 	"hclk_usb_niu",
 	"pll_npll",
 	"usb480m",
+	"clk_uart2",
+	"pclk_uart2",
 };
 
 static void __iomem *px30_cru_base;