drm/i915/bxt: Pass drm_i915_private to DDI PHY, CDCLK helpers

For internal APIs passing dev_priv is preferred to reduce indirections,
so convert over a few DDI PHY, CDCLK helpers.

No functional change.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: David Weinehall <david.weinehall@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459515767-29228-10-git-send-email-imre.deak@intel.com
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 93e0141..b644fb7 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1224,10 +1224,10 @@
 void intel_finish_reset(struct drm_device *dev);
 void hsw_enable_pc8(struct drm_i915_private *dev_priv);
 void hsw_disable_pc8(struct drm_i915_private *dev_priv);
-void broxton_init_cdclk(struct drm_device *dev);
-void broxton_uninit_cdclk(struct drm_device *dev);
-void broxton_ddi_phy_init(struct drm_device *dev);
-void broxton_ddi_phy_uninit(struct drm_device *dev);
+void broxton_init_cdclk(struct drm_i915_private *dev_priv);
+void broxton_uninit_cdclk(struct drm_i915_private *dev_priv);
+void broxton_ddi_phy_init(struct drm_i915_private *dev_priv);
+void broxton_ddi_phy_uninit(struct drm_i915_private *dev_priv);
 void bxt_enable_dc9(struct drm_i915_private *dev_priv);
 void bxt_disable_dc9(struct drm_i915_private *dev_priv);
 void skl_init_cdclk(struct drm_i915_private *dev_priv);