phy: dphy: refactor get_default_config

Factor out the calculation into phy_mipi_dphy_calc_config(). This is
needed for the follow up patch which adds the support to calculate the
timings based on a given hs clock. No functional changes are done.

Signed-off-by: Marco Felsch <[e-mail]>
Acked-by: Vinod Koul <[e-mail]>
Signed-off-by: Sakari Ailus <[e-mail]>

drivers/phy/phy-core-mipi-dphy.c

···
  * from the valid ranges specified in Section 6.9, Table 14, Page 41
  * of the D-PHY specification (v1.2).
  */
-int phy_mipi_dphy_get_default_config(unsigned long pixel_clock,
+static int phy_mipi_dphy_calc_config(unsigned long pixel_clock,
 				     unsigned int bpp,
 				     unsigned int lanes,
 				     struct phy_configure_opts_mipi_dphy *cfg)
···
 	cfg->lanes = lanes;
 
 	return 0;
+}
+
+int phy_mipi_dphy_get_default_config(unsigned long pixel_clock,
+				     unsigned int bpp,
+				     unsigned int lanes,
+				     struct phy_configure_opts_mipi_dphy *cfg)
+{
+	return phy_mipi_dphy_calc_config(pixel_clock, bpp, lanes, cfg);
+
 }
 EXPORT_SYMBOL(phy_mipi_dphy_get_default_config);