clk: rockchip: add support for pvtm clk

add pvtm 32K internal clock setting and select enable.

Change-Id: I60225d29e16c5b96f285623260bea475c78a026a
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>

drivers/clk/rockchip/Makefile

@@ -11,6 +11,7 @@ obj-y	+= clk-inverter.o
 obj-y	+= clk-mmc-phase.o
 obj-y	+= clk-muxgrf.o
 obj-y	+= clk-ddr.o
+obj-y	+= clk-pvtm.o
 obj-$(CONFIG_RESET_CONTROLLER)	+= softrst.o
 
 obj-y	+= clk-px30.o

drivers/clk/rockchip/clk-pvtm.c

@@ -172,7 +172,6 @@ static int clock_pvtm_regitstor(struct device *dev,
 	/* Init the xin32k_pvtm */
 	pvtm->info->init_freq(pvtm);
 
-	init.flags = CLK_IS_ROOT;
 	init.parent_names = NULL;
 	init.num_parents = 0;
 	init.name = "xin32k_pvtm";