disp: msm: dsi: Update dsi byte interface clock calculation

Update dsi byte interface clock as per hardware recommendation.
For Phy ver 2.0 and below: byte intf clk equals to byte clk.
For Phy ver 3.0 and above: byte intf clk equals to byte clk / 2.

Change-Id: Ic3af2e4348403aeacb2e1c73c4dc133db63a51a4
Signed-off-by: Ritesh Kumar <riteshk@codeaurora.org>
Signed-off-by: Lipsa Rout <lrout@codeaurora.org>
Signed-off-by: Satya Rama Aditya Pinapala <psraditya30@codeaurora.org>

msm/dsi/dsi_phy.c

@@ -111,6 +111,11 @@ static const struct of_device_id msm_dsi_phy_of_match[] = {
 	{}
 };
 
+int dsi_phy_get_version(struct msm_dsi_phy *phy)
+{
+	return phy->ver_info->version;
+}
+
 static int dsi_phy_regmap_init(struct platform_device *pdev,
 			       struct msm_dsi_phy *phy)
 {