drm/i915: move pc8.irqs_disabled to pm.irqs_disabled

When other platforms add runtime PM support they will also need to
disable interrupts, so move the variable to the runtime PM struct.

Also notice that the longer-term goal is to completely kill the
regsave struct, and I even have patches for that.

v2: - Rebase.
v3: - Rebase.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 0210271..84a80b6 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1390,8 +1390,12 @@
  * For more, read "Display Sequences for Package C8" on our documentation.
  */
 struct i915_package_c8 {
-	bool irqs_disabled;
 	struct mutex lock;
+};
+
+struct i915_runtime_pm {
+	bool suspended;
+	bool irqs_disabled;
 
 	struct {
 		uint32_t deimr;
@@ -1402,10 +1406,6 @@
 	} regsave;
 };
 
-struct i915_runtime_pm {
-	bool suspended;
-};
-
 enum intel_pipe_crc_source {
 	INTEL_PIPE_CRC_SOURCE_NONE,
 	INTEL_PIPE_CRC_SOURCE_PLANE1,