drm/i915: move I915_STATE_WARN() and _ON() to intel_display.h

It's for display. Seems like a better fit. Reduce clutter in i915_drv.h.
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/8fefcf69b6dcdb7b9c920aeded35c5f8928b9602.1565271681.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_display.h

@@ -571,4 +571,22 @@ void assert_pipe(struct drm_i915_private *dev_priv, enum pipe pipe, bool state);
 #define assert_pipe_enabled(d, p) assert_pipe(d, p, true)
 #define assert_pipe_disabled(d, p) assert_pipe(d, p, false)
 
+/* Use I915_STATE_WARN(x) and I915_STATE_WARN_ON() (rather than WARN() and
+ * WARN_ON()) for hw state sanity checks to check for unexpected conditions
+ * which may not necessarily be a user visible problem.  This will either
+ * WARN() or DRM_ERROR() depending on the verbose_checks moduleparam, to
+ * enable distros and users to tailor their preferred amount of i915 abrt
+ * spam.
+ */
+#define I915_STATE_WARN(condition, format...) ({			\
+	int __ret_warn_on = !!(condition);				\
+	if (unlikely(__ret_warn_on))					\
+		if (!WARN(i915_modparams.verbose_state_checks, format))	\
+			DRM_ERROR(format);				\
+	unlikely(__ret_warn_on);					\
+})
+
+#define I915_STATE_WARN_ON(x)						\
+	I915_STATE_WARN((x), "%s", "WARN_ON(" __stringify(x) ")")
+
 #endif

drivers/gpu/drm/i915/i915_drv.h

@@ -104,24 +104,6 @@
 #define DRIVER_DATE		"20190730"
 #define DRIVER_TIMESTAMP	1564512624
 
-/* Use I915_STATE_WARN(x) and I915_STATE_WARN_ON() (rather than WARN() and
- * WARN_ON()) for hw state sanity checks to check for unexpected conditions
- * which may not necessarily be a user visible problem.  This will either
- * WARN() or DRM_ERROR() depending on the verbose_checks moduleparam, to
- * enable distros and users to tailor their preferred amount of i915 abrt
- * spam.
- */
-#define I915_STATE_WARN(condition, format...) ({			\
-	int __ret_warn_on = !!(condition);				\
-	if (unlikely(__ret_warn_on))					\
-		if (!WARN(i915_modparams.verbose_state_checks, format))	\
-			DRM_ERROR(format);				\
-	unlikely(__ret_warn_on);					\
-})
-
-#define I915_STATE_WARN_ON(x)						\
-	I915_STATE_WARN((x), "%s", "WARN_ON(" __stringify(x) ")")
-
 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
 
 int __i915_inject_load_error(struct drm_i915_private *i915, int err,