drm/i915: avoid including intel_drv.h via i915_drv.h->i915_trace.h

Disentangle i915_drv.h from intel_drv.h, which gets included via
i915_trace.h. This necessitates including i915_trace.h wherever it's
needed.

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/ed82bf259d3b725a1a1a3c3e9d6fb5c08bc4d489.1565085691.git.jani.nikula@intel.com

drivers/gpu/drm/i915/gem/i915_gem_clflush.c

@@ -8,6 +8,7 @@
 
 #include "i915_drv.h"
 #include "i915_gem_clflush.h"
+#include "i915_trace.h"
 
 static DEFINE_SPINLOCK(clflush_lock);
 

drivers/gpu/drm/i915/gem/i915_gem_mman.c

@@ -13,6 +13,7 @@
 #include "i915_gem_gtt.h"
 #include "i915_gem_ioctls.h"
 #include "i915_gem_object.h"
+#include "i915_trace.h"
 #include "i915_vma.h"
 #include "intel_drv.h"
 

drivers/gpu/drm/i915/gem/i915_gem_object.c

@@ -29,6 +29,7 @@
 #include "i915_gem_context.h"
 #include "i915_gem_object.h"
 #include "i915_globals.h"
+#include "i915_trace.h"
 
 static struct i915_global_object {
 	struct i915_global base;

drivers/gpu/drm/i915/gem/i915_gem_shmem.c

@@ -10,6 +10,7 @@
 #include "i915_drv.h"
 #include "i915_gem_object.h"
 #include "i915_scatterlist.h"
+#include "i915_trace.h"
 
 /*
  * Move pages to appropriate lru and release the pagevec, decrementing the