drm/i915: sprinkle static

Apparently we've missed a few more than what Fengguang's 0-day tester
recently reported in i915_irq.c ... Makes sparse happy again (ignore
some spurious stuff about ksyms of exported functions).

Cc: kbuild test robot <fengguang.wu@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_irq.c

@@ -482,7 +482,7 @@ bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev,
 }
 
 
-void
+static void
 __i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
 		       u32 enable_mask, u32 status_mask)
 {
@@ -506,7 +506,7 @@ __i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
 	POSTING_READ(reg);
 }
 
-void
+static void
 __i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
 		        u32 enable_mask, u32 status_mask)
 {

drivers/gpu/drm/i915/intel_display.c

@@ -7692,7 +7692,7 @@ __intel_framebuffer_create(struct drm_device *dev,
 	return ERR_PTR(ret);
 }
 
-struct drm_framebuffer *
+static struct drm_framebuffer *
 intel_framebuffer_create(struct drm_device *dev,
 			 struct drm_mode_fb_cmd2 *mode_cmd,
 			 struct drm_i915_gem_object *obj)
@@ -10541,7 +10541,7 @@ static const struct drm_framebuffer_funcs intel_fb_funcs = {
 	.create_handle = intel_user_framebuffer_create_handle,
 };
 
-int intel_framebuffer_init(struct drm_device *dev,
+static int intel_framebuffer_init(struct drm_device *dev,
 				  struct intel_framebuffer *intel_fb,
 				  struct drm_mode_fb_cmd2 *mode_cmd,
 				  struct drm_i915_gem_object *obj)