drm/i915: Add support for integrated HDMI on G4X hardware.

This is ported directly from the userland 2D driver code.  The HDMI audio bits
aren't hooked up yet.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index dd57a5b..793cba3 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -13,6 +13,7 @@
 	  intel_crt.o \
 	  intel_lvds.o \
 	  intel_bios.o \
+	  intel_hdmi.o \
 	  intel_sdvo.o \
 	  intel_modes.o \
 	  intel_i2c.o \