drm/i915/i2c: Track the parent encoder rather than just the dev

The SDVO proxy i2c adapter wants to be able to use information stored in
the encoder, so pass that through intel_i2c rather than iterate over all
known encoders every time.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index bba0aba..93d5b61 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -243,26 +243,28 @@
 	/* Set up the DDC bus. */
 	if (sdvox_reg == SDVOB) {
 		intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
-		intel_encoder->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB");
+		intel_encoder->ddc_bus = intel_i2c_create(intel_encoder,
+							  GPIOE, "HDMIB");
 		dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == SDVOC) {
 		intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
-		intel_encoder->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");
+		intel_encoder->ddc_bus = intel_i2c_create(intel_encoder,
+							  GPIOD, "HDMIC");
 		dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == HDMIB) {
 		intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
-		intel_encoder->ddc_bus = intel_i2c_create(dev, PCH_GPIOE,
-								"HDMIB");
+		intel_encoder->ddc_bus = intel_i2c_create(intel_encoder,
+							  PCH_GPIOE, "HDMIB");
 		dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == HDMIC) {
 		intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
-		intel_encoder->ddc_bus = intel_i2c_create(dev, PCH_GPIOD,
-								"HDMIC");
+		intel_encoder->ddc_bus = intel_i2c_create(intel_encoder,
+							  PCH_GPIOD, "HDMIC");
 		dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == HDMID) {
 		intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
-		intel_encoder->ddc_bus = intel_i2c_create(dev, PCH_GPIOF,
-								"HDMID");
+		intel_encoder->ddc_bus = intel_i2c_create(intel_encoder,
+							  PCH_GPIOF, "HDMID");
 		dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
 	}
 	if (!intel_encoder->ddc_bus)