drm/i915: rename intel_drv.h to display/intel_display_types.h

Everything about the file is about display, and mostly about types
related to display. Move under display/ as intel_display_types.h to
reflect the facts.

There's still plenty to clean up, but start off with moving the file
where it logically belongs and naming according to contents.

v2: fix the include guard name in the renamed file

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190806113933.11799-1-jani.nikula@intel.com
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index bea440a..ff26c4d 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -51,6 +51,7 @@
 #include "display/intel_audio.h"
 #include "display/intel_bw.h"
 #include "display/intel_cdclk.h"
+#include "display/intel_display_types.h"
 #include "display/intel_dp.h"
 #include "display/intel_fbdev.h"
 #include "display/intel_gmbus.h"
@@ -76,7 +77,6 @@
 #include "i915_trace.h"
 #include "i915_vgpu.h"
 #include "intel_csr.h"
-#include "intel_drv.h"
 #include "intel_pm.h"
 
 static struct drm_driver driver;