disp: msm: dsi: add support for dsi dynamic clock switch

This change adds support for dynamic switching of dsi clocks
to avoid RF interference issues. Also with dynamic dsi clock
switch feature coming into picture, now populate the supported
refresh rate as list instead of providing a range. Modify the
logic to enumerate all the modes in dsi driver, taking dynamic
bit clocks, resolutions and refresh rates into account.

Change-Id: I5b6e62bc935cf2234bdd96fcb3c7537b4e735fff
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>
Signed-off-by: Ritesh Kumar <riteshk@codeaurora.org>
Signed-off-by: Yujun Zhang <yujunzhang@codeaurora.org>

msm/dsi/dsi_clk.h

@@ -307,4 +307,18 @@ int dsi_clk_set_byte_clk_rate(void *client, u64 byte_clk, u32 index);
  */
 int dsi_clk_update_parent(struct dsi_clk_link_set *parent,
 			  struct dsi_clk_link_set *child);
+
+/**
+ * dsi_clk_prepare_enable() - prepare and enable dsi src clocks
+ * @clk:       list of src clocks.
+ *
+ * @return:	Zero on success and err no on failure
+ */
+int dsi_clk_prepare_enable(struct dsi_clk_link_set *clk);
+
+/**
+ * dsi_clk_disable_unprepare() - disable and unprepare dsi src clocks
+ * @clk:       list of src clocks.
+ */
+void dsi_clk_disable_unprepare(struct dsi_clk_link_set *clk);
 #endif /* _DSI_CLK_H_ */